One who eats everything

A. Omnivorous

B. Omniscient

C. Irresistible

D. Insolvent

Answer: Option A

Solution(By Examveda Team)

One word substitution is Omnivorous.

Omnivorous: feeding on a variety of food of both plant and animal origin.
Omniscient: knowing everything.
Irresistible: too powerful or convincing to be resisted.
Insolvent: unable to pay debts owed.