Refer to the Following Paragraph and Accompanying Figure to Answer

Multiple Choice

Refer to the following paragraph and accompanying figure to answer the following question(s) .
-Gramicidin is an antibiotic that increases the permeability of bacterial cell walls to inorganic ions. What is the most likely mode of action of gramicidin?

A) It acts by active transport.
B) It causes membranes to fuse with one another.
C) It forms a channel in the membrane.
D) It removes electrical charges from solutes.