Final answer:
The psychological condition likely to have led to David's behavior is deindividuation, where a person feels a sense of anonymity and reduced self-identity when among others. So, the correct answer is option d.
Step-by-step explanation:
The psychological condition that is likely to have led to David's participation in the shoving match is deindividuation.
Deindividuation refers to situations where a person feels a sense of anonymity and a reduction in accountability and self-identity when among others.
In this case, being part of a large group protest can create a sense of anonymity and result in individuals behaving in ways they normally wouldn't, as their personal identity is diminished in the presence of the crowd. So, the correct answer is option d.