You Have a Small Tree in Your Yard That Is

You have a small tree in your yard that is the height that you want it,but not as many branches as you want it to be.How can you prune it to trigger it to increase the number of branches?

A) Cut off the leaves at the ends of several branches.
B) Cut off the tips of the main shoots.
C) Cut off lower branches.
D) Cut some of the higher branches off at the stem.
E) Cut off the leaves at the base of most of the branches.