Which Scenario Is an Example of a Parent's Indirect Socialization

Which scenario is an example of a parent's indirect socialization of generosity?

A) Tanya's mother signs her child up for volunteer work at the local hospital after school.
B) Frank's dad explains to his child how important it is to give to people who have less than them.
C) Hannah's mom often makes food for a neighborhood mother whose husband is ill.
D) Michael's dad tells his children that they need to share their toys when their friends play at their home.