III. Reading Comprehension: Read the following passages and choose the best
answer to each question. @2
Passage (1)
      One of the oldest questions has been solved--"Which came first, the chicken or the egg?" Researchers from Sheffield and Warwick Universities in England have discovered the answer to the question. They used a super computer to investigate the process of shell making and then they found one of the essential ingredients forming eggshell only came from a chicken's ovaries. Therefore, it is proof that the chicken
came first and eggs came after the chicken. The researchers added that eggs are one of nature's most amazing creations, attracting a lot of designers to make things out of egg-like materials. These materials are lightweight but incredibly strong.
【題組】31. Why did the researchers say eggs came after the chicken?
(A) Because one of the egg-forming ingredients comes only from the chicken.
(B) Because eggshell could be used to make a lot of products.
(C) Because eggs are much lighter than the chicken.
(D) Because they are British researchers.