题目内容：

Parents will do anything for their children. Whether it would be the food, clothes, or the place they live, parents will always make sure their children have the best of everything. One of the biggest concerns that parents currently have is educating their children. They are faced with lots of difficulties when it comes to education for their young ones. Choices include private school, charter school, public school or homeschooling.

Fortunately for parents, there are a variety of different strategies that a parent can take in order to increase their child's skills and overall intelligence. According to Ross A. Thompson, PhD, professor of psychology at the University of California at Davis, a child's brain will actually reach 90% of its full size by the time they start kindergarten.

Researchers at Northwestern University in Chicago concluded that playing a musical instrument directly affected the brain stem, the lower section of the brain. Moreover, children that learn an instrument at an early age tend to continue it when they are older. And numerous studies show that a well balanced meal is essential for a child's mental and physical health. It is recommended that parents teach their children two languages at once. Research suggests that a second language should be taught when children are in preschool. Other studies state that three to four years of age is the perfect time. Clearly, any age under four would work perfectly fine for a child.

The average child will learn how to read between kindergarten and second grade. Many parents can give their children a jump start by teaching them to read before they start school. Children could have an adequate background of the alphabet and sounds of words before attending school. This can be done by simply reading to them whenever you want. The more comfortable they get, the easier the process will be.

1.From the first paragraph, we can infer that ________.

A. parents find it hard to satisfy their kids' various demands

B. parents meet a new challenge when raising their kids

C. parents have more choices in offering education to their kids

D. parents get actively involved in the process of their kids' growth

2.What suggestion may the researchers in the passage make?

A. To train kids as early as possible.

B. To try as many means as possible.

C. To help kids develop as fully as possible.

D. To use as many available resources as possible.

3.What does the third paragraph mainly discuss about?

A. The proper time to teach children to learn languages.

B. The effective ways to help develop children's brains.

C. The vital factors to have a great effect on children's health.

D. The practical steps to arouse children’s interest in study.

4.We can replace the words “jump start” in the last paragraph with ________.

A. inspirationB. introductionC. suggestionD. promotion