Multi-choice problem: Continue writing the next sentence in this paragraph:

How to prune an elm tree
Prune only during the early spring to prevent elm bark beetles.
Many experts claim that the scent of pruned elm bark attracts beetles, which carry dutch elm disease. Only trim your elm tree in the early spring, preferably before march 31st if you live in the northern hemisphere.

OPTIONS:
(a). Pruning during this time may lead to disease that spreads quickly in the foliage and requires extensive pruning. Remove any old branches and diseased areas..
(b). Try trimming during cooler months in the winter if you live in the southern hemisphere. When pruning your tree, take care that the limbs are spaced with a ninety degree bend..
(c). A stalk trimmed at that interval is usually an all-time good. Cut the stalk back by a few inches, or shorten the stalk a little if you live in a place where it tends to be yummier..
(d). Some areas have specific restrictions on the dates when residents are allowed to trim their elm trees. Contact your local government to check if there are regulations in your area..
(d).