What best completes the sentence: I tried not to get involved in that situation?

The completion of the sentence with "I attempted to avoid getting involved in" effectively reinforces the speaker's intention and effort to stay out of the situation. The word "attempted" conveys an active effort, highlighting that the speaker made a conscious choice to not participate. Additionally, "avoid getting involved" aligns cohesively with the notion of not wanting to be part of something, providing clarity and maintaining the original sentiment of the sentence.

In contrast, other choices change the tone or meaning of the original sentiment. "I found it impossible to avoid getting mixed up in" implies a lack of control or a sense of inevitability, which contradicts the effort suggested in the original statement. "I succeeded in avoiding getting involved in" suggests a successful outcome but does not reflect the ongoing struggle implied by the word "tried." Lastly, "I managed to get involved in" completely alters the meaning, indicating involvement contrary to the original intent of avoidance. Thus, the chosen answer succinctly captures the essence of the speaker's experience and intention.