He is just dabbling in politics to promote his business interests.

Answer: Option B

Including : containing as part of the whole being considered.
Participating : be involved; take part.
Helping : a portion of food served to one person at one time.
Interfering : (of a person) tending to interfere in other people's affairs.
Dabbling : take part in an activity in a casual or superficial way.

Synonym of Dabbling is Participating