Your explanation that your social commitments tie you down, does not convince me.

Answer: Option D

Reduction : the action or fact of making something smaller or less in amount, degree, or size.
Depletion : reduction in the number or quantity of something.
Restrictions : a limiting condition or measure, especially a legal one.
Obligations : an act or course of action to which a person is morally or legally bound; a duty or commitment.
Commitments : the state or quality of being dedicated to a cause, activity, etc.

Synonym of Commitments is Obligations