单选题
[阅读选择]As far as astronomers（天文学家） can determine， the entire universe is built of the same matter. They have no reason to doubt that matter obeys the same laws in every part of the universe. Therefore， it is reasonable to guess that other stars， with their own planets， were born in the same way as our own solar system. What we know of life on earth suggests that life will arise wherever the proper conditions exist.
Astronomers believe that matter in different parts of the universe
A.obeys different laws.
B.obeys one common law.
C.obeys the same laws.
D.obeys no common law.
正确答案：C
答案解析：答题依据在本段的第二句。科学家没有理由怀疑宇宙中的物质遵循同一法则，即他们相信宇宙中不同地方的物质是遵循同一法则的。