Answer:
C
Explanation:
The Greco-Roman physician Galen advocated the bleeding of patients with leeches, a practice that persisted in various parts of the world for many centuries. Throughout most of Western history, leeching—or leechcraft—became such a common practice that a physician was commonly referred to as a “leech.”
It is an Adverb. Adverb modifies and functions like an adjective.
Janet has been given authority to use the firm's credit card. If she was given permission, she was given authority, those two are synonymous.