Suppose $\Delta$ G ^$\circ$ Is 25

Suppose $\Delta$ G ^$\circ$ is 25.0 kJ/mol for a hypothetical reaction in which A converts into B. Which of the following statements describes an equilibrium mixture of A and B?

A) Only A is present.
B) Only B is present.
C) A and B have equal concentrations.
D) A has a higher concentration than B.
E) B has a higher concentration than A.