What Is Happening in the Figure Shown

What is happening in the figure shown?

A) The mold on the left is producing a compound that inhibits the growth of the bacterial colonies on the right.
B) The mold on the left is outcompeting the bacterial cells for nutrients and therefore is growing faster.
C) The bacterial cells on the right are inhibiting the growth of the mold on the left.
D) The mold and bacterial cells are growing in a symbiotic relationship.