According to Costly Signaling Theory,how Does Context Affect Our Altruistic

According to costly signaling theory,how does context affect our altruistic tendencies?

A) When engaging in an altruistic act,we tend toward the least costly option regardless of context.
B) When behaving altruistically anonymously,we are more likely to choose a low-cost option.
C) In the presence of strangers,we do not behave altruistically.
D) When volunteering publically,we typically choose the least costly option.