44. The word "obvious" in line 10 is closest in meaning to (A) discovered (B) apparent (C) understood (D) simplistic

49. Why does the author mention the Virgo galaxy and the Andromeda galaxy in the third paragraph? (A) To describe the effect that distance has no visibility. (B) To compare the ages of two relatively young galaxies. (C) To emphasize the vast distances of the galaxies from Earth. (D) To explain why certain galaxies cannot be seen by a telescope.