题目内容：

    Many of us listen to music while we work, thinking that it will help us to concentrate on the task at hand. And in fact, recent research has found that music can have beneficial effects on creativity. When it comes to other areas of performance, however, the impact of background music is more complicated.

The idea that listening to music when working is beneficial to output probably has its roots in the so-called “Mozart effect”. Put simply, this is the finding that spatial rotation performance(空间旋转能力) is increased immediately after listening to the music of Mozart, compared to no sound at all.

How sound affects performance has been the topic of research for over 40 years, and is observed through a phenomenon called the irrelevant sound effect. To study irrelevant sound effect, participants in the research are asked to complete a simple task which requires them to recall a series of numbers or letters in the exact order in which they saw them. The tricky thing is being able to do this while ignoring any background noise.

Two key characteristics of the irrelevant sound effect are required for its observation. First, the task must require the person to use their rehearsal abilities(复述能力), and second, the sound must contain acoustical variation(声学变化). Where the sound does not vary much acoustically, the performance of the task is much closer to that observed in quiet conditions.

The irrelevant sound effect itself comes from attempting to process two sources of ordered information at the same time—one from the task and one from the sound. Unfortunately, only the former is required to successfully perform the  recall task, and the effort in ensuring that irrelevant order information from the sound is not processed actually hinders(阻碍) this ability.

A similar conflict is also seen when reading while in the presence of lyrical music. In this situation, the two sources of words—from the task and the sound—are in conflict. The cost is poorer performance of the task in the presence of music with lyrics.

What this all means is that whether having music playing in the background helps or hinders performance depends on the task and on the type of music, and only understanding this relationship will help people maximize their productivity levels.

1.“Mozart effect” is mentioned to ________.

A. explain how music can relax people

B. show music can improve performance

C. advise people to listen to Mozart music

D. stress Mozart music gains wide attention

2.It can be inferred that participants in the research ________.

A. have improved their rehearsal ability

B. perform better in the quiet conditions

C. ignore the background noise successfully

D. prefer the music with great sound variation

3.Paragraph 6 is written to ________.

A. support an idea B. make a contrast

C. introduce a topic D. describe a fact

4.What is the best title for the passage?

A. Music shapes your life

B. Music develops your creativity

C. Choose quiet music for your work

D. Does music make you concentrate?