Directions: Read the following five sentences, each containing a word highlighted in bold. Determine which sentence(s) correctly use(s) its highlighted word and mark it as your answer.

A. Their disparate backgrounds made their friendship unlikely but interesting.
B. The employees gathered to mitigate against the unfair pay cuts.
C. His genuine approach made teamwork challenging.
D. The speaker’s ebullient energy kept the audience engaged.
E. The company's egregious mistake cost them millions.