judy blume's career as an american writer spans four decades and includes many literary awards. she is most famous for her novels geared toward pre-teens. one notable example is tales of a fourth-grade nothing. however, blume also has had success writing for an adult audience. three of her novels for adults reached the new york times best-seller list. in a 2008 interview blume remarked, "i have so many stories left to tell! " by that time she had written nearly 30 novels. judy blume is an exceptionally talented and productive american author.

identify the main idea of this paragraph.

judy blume has been writing for a very long time. (explicit)
judy blume has been writing for a very long time. (implicit)
judy blume has been a very busy and gifted writer. (explicit)
judy blume has been a very busy and gifted writer. (implicit)

walking is not the most exciting form of exercise a person can take on for fitness. yet it is low impact and requires no fancy equipment. that makes walking a simple activity for those new to exercise. walking is less likely than other exercises to cause injury to leg tendons and muscles. all it requires is a good pair of sneakers—no cables, stylish outfits, or weights required. of course, a person could increase the benefit of a workout by adding weights or speed walking.

which of the following statements supports the main idea in this paragraph? walking is boring.
walking has a low risk of injury.
walking requires sneakers in good condition.
walking is too easy for those who exercise regularly.