Through Which of the Following Actions Did Sir Henry Clinton

Through which of the following actions did Sir Henry Clinton launch his southern campaign in 1778?

A) Capturing Savannah,Georgia,and mobilizing hundreds of blacks
B) Advancing his troops from Philadelphia toward Virginia to entrap Washington's army
C) Issuing the Philipsburg Proclamation,promising freedom to rebel slaves
D) Fortifying his position at Philadelphia and daring Washington to attack him