Question

sympathetic nerves
stimulate gastric secretion.
allow us to relax, rest, and recover.
provoke feelings of sympathy.
control swallowing.
have short preganglionic fibers and long postganglionic fibers.

Explanation:

Sympathetic nerves are part of the autonomic nervous system. They are activated in "fight - or - flight" situations. Their preganglionic fibers are short, and postganglionic fibers are long. The parasympathetic nervous system (not sympathetic) stimulates gastric secretion (digestion is a "rest - and - digest" function), allows relaxation/rest/recovery (parasympathetic is "rest - and - digest"), and controls swallowing (involves somatic and parasympathetic components in some aspects). Sympathetic nerves do not provoke feelings of sympathy (a psychological/social concept not related to the physiological function of sympathetic nerves).

Answer:

have short preganglionic fibers and long postganglionic fibers.