How Might Presidents Use Their Powers of Persuasion in the Legislative

How might presidents use their powers of persuasion in the legislative process?

A) in leading public opinion to support their policy agendas
B) through the withholding of funds to prevent the implementation of specific laws
C) in leading public opinion to support signing statements on key pieces of legislation
D) in selecting majority and minority leaders in Congress
E) through direct lobbying of regulatory bureaucrats on the implementation of policy details