Why Did General William Howe Choose Not to Pursue and Defeat

Why did General William Howe choose not to pursue and defeat George Washington's army after the Battle of Long Island?

A) Howe remembered the slaughter of Bunker Hill.
B) Howe distrusted Washington's large Hessian forces.
C) Howe feared the presence of Indians in the area.
D) Howe did not look forward to the difficulties of warfare in summer heat.
E) Supplies were slow in coming.