Before a Fatty Acid Can Undergo $\beta$ -Oxidation, It Must Be Activated and Then Shuttled Across the Be

Before a fatty acid can undergo $\beta$ -oxidation, it must be activated and then shuttled across the inner mitochondrial membrane. The activating agent and shuttle molecule are, respectively,

A) CoA and carnitine
B) CoA and citrate
C) acetyl CoA and carnitine
D) acetyl CoA and citrate