Sylvester was thrilled when he received a large bonus from his company. Later that day, when he was asked if he could volunteer a few hours to help at the Food Bank, he readily agreed.
This example best illustrates the:

A) "feel-good, do-good" effect.
B) bystander effect.
C) self-serving bias.
D) actor-observer discrepancy.

A) "feel-good, do-good" effect.

Explanation:

In psychology, the term "feel-good, do-good" effect refers to the tendency that people have to want to help other people when they are in a good mood. In other words, you are more likely to help another person when you feel well about yourself.

In this case, Sylvester has just received a large bonus from his company. Later that day, when he is asked if we could volunteer at the Food Bank he readily agreed. Sylvester was feeling good and was in a good mood because of the large bonus, therefore he was most likely to agreed to help. Thus this example best illustrates the "feel-good, do-good" effect.