The adjective in the sentence is "best."
The adjective "best" is used to describe the course of action chosen by Lucy, which is to become the president of the board. Adjectives are words that modify or describe nouns or pronouns by providing additional information about their qualities or attributes. In this case, the adjective "best" indicates that Lucy has carefully considered her options and determined that becoming the president of the board is the most favorable or advantageous course of action for her. The word "best" suggests that Lucy has evaluated different possibilities and concluded that assuming the role of president of the board would be the most suitable decision. It implies that Lucy believes this choice will lead to the most positive outcomes or fulfill her objectives effectively. By using the adjective "best," the sentence conveys Lucy's conviction that becoming the president of the board is the optimal and most desirable option among the available alternatives.
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