After his romantic interest was not reciprocated, what coping mechanism did SSgt Manis display?

Acceptance is the correct choice because it reflects a healthy coping mechanism where an individual acknowledges the reality of their circumstances without trying to change or deny them. In the context of SSgt Manis, this would imply that after experiencing unreciprocated feelings, he accepted the situation and came to terms with the fact that his romantic interest was not mutual. This process is often essential for emotional healing, allowing one to move forward rather than remain stuck in feelings of disappointment or longing.

In psychological terms, acceptance is a step toward emotional resilience and maturity, as it enables a person to deal with their emotions constructively and promotes personal growth. This understanding is crucial for individuals undergoing similar experiences, as it encourages healthy processing of emotions rather than avoidance or excessive emotional turmoil.