The ”lie” is that the speaker is a/an?

WILLIAM SHAKESPEARE: The Tempest

Read the extract and answer the question

Thou liest, most ignorant monster! I am in case to justle a constable. Why, thou deboshed fish, thou, was there ever man a coward that hath drunk so much sack as I today. Wilt thou tell a monstrous lie, being but half a fish and half a monster?

(act 111, scene two lines 23-27)

A. drunkard
B. coward
C. ass
D. idiot

Correct Answer:

Option B – coward