The Challenger was crude and experience

A) foul
B) rude
C) vulgar
D) decent

C) vulgar

Based on the given sentence, none of the options provided seem to be a fitting description for the Challenger. Here's the correct answer:

D) decent

The word "crude" implies a lack of sophistication or refinement, while "experience" suggests that the Challenger has some level of skill or competence. Therefore, "decent" would be the most appropriate choice as it implies a satisfactory or acceptable level of quality or behavior.