39. The word “prevailing” in line 19 is closest in meaning to (A)essential (B)dominant (C)circular (D)closest

44. The passage supports which of the following statements about the Surveyor and Apollo missions? (A)They confirmed earlier theories about the Moon’s surface. (B)They revealed that previous ideas about the Moon’s craters were incorrect. (C)They were unable to provide detailed information about the Moon’s surface. (D)They were unable to identify how the Moon’s craters were made.