Answer:
It is either B or C. C has a higher chance. You don't have to listen to me. If his face turns from smiling and then let the smile fade, it is most likely he is afraid or suprise.
Explanation:
The answer is D.
Compound sentence uses one independent clause and one dependent clause. In option D, “after they finished studying” is the dependent clause. “Juan and Maria went to the movies” is the independent clause.
The two phases are called "Waxing crescent moon" and "Waning gibbous moon". During these two phases one can barely see the moon.