Correct Answer:
A. tries
This sentence completion question tests subject-verb agreement and contextual meaning. The phrase "one of those people who" refers to the plural "people," so the verb for "who" should be plural. However, the question is about the most appropriate verb based on the context of "finding the positive."
- (A) tries is the correct answer. The sentence describes a characteristic behavior of someone who consistently makes an effort to find the positive. "Tries" implies consistent effort or an attempt to achieve something, which fits the positive connotation of the sentence, suggesting a proactive and optimistic approach.
- (B) manages is incorrect because while grammatically plausible, it implies successful completion, which might be too strong if the focus is on the *effort* or *disposition* rather than guaranteed success.
- (C) struggles is incorrect as it implies difficulty and effort, but often with a negative connotation of not succeeding easily, which contradicts the idea of "finding the positive."
- (D) fails is incorrect because it is an antonym, implying an inability to find the positive, which contradicts the intended meaning of the sentence.
Therefore, "tries" best conveys the consistent effort to maintain a positive outlook.