题目内容：

    When Jeff Sparkman draws his cartoon superheroes, he often has to ask other people to tell him what color his characters turned out to be because he's color-blind. Now, a new smart phone application can help him figure out what colors he's using and how the picture looks to others.

The DanKam app, available for iPhone and Android for $2.99, is an application that makes the vague colors that one percent of the population with color-blindness sees more like the "true" colors as everyone else sees them. In America, around 32 million color-blind Americans---95% are males---can soon have their life improved.

"DanKam takes the stream of data coming in through the phone's camera and changes the colors slightly so they fall within the range that people who are color-blind see," developer Dan Kaminsky told CNET. He came up with the idea after watching the film Star Trek with a color-blind friend.

It was then that he got to know more about colorblindness like its varying types and degrees. A vast majority, for instance, have trouble seeing red or green due to a genetic defect(缺陷). Blue-yellow colorblindness, however, is rarer and develops later in life because of aging, illness or head injuries, etc.

What the DanKam app attempts to do is to clean up the color space of the image signal so that colors can be seen to those suffering from viewing problems. “You can customize the app to fit your needs. There is a range and not everyone who is color-blind sees things the same.” Says Kaminsky.

Sparkman, a copy editor at CNET, tried out the app and was pleased with the results. "It would be useful for dressing for a job interview," he said. But using it for his art is “the most practical application." It worked well on LED and other lights on electronic devices, which means Sparkman can now identify the power light on his computer display as green.

1.According to passage, DanKam ___________.

A.was developed by Jeff Sparkman. B.appeared in the movie Star Trek.

C.is designed to help the blind. D.can be purchased with a fee

2.It can be known from the passage that colorblindness __________.

A.causes trouble in telling all colors B.occurs more commonly in females

C.is not necessarily an inborn disease D.leaves people unable to see clearly

3.How does the DanKam app work?

A.It makes vague colors become vivid ones. B.It operates in a fixed color model.

C.It shows images with an adjusted color space. D.It puts LED lights on electronic devices.

4.Which of the following serves as the best title for the passage?

A.Dankam: A New Treatment For Colorblindness.

B.DanKam: Augmented(增强) Reality For Colorblindness.

C.Dan Kaminsky: A Campaign Against Colorblindness.

D..Jeff Sparkman: Satisfaction Guaranteed By DanKam.