Why Is The $\Delta$ G $\degree$ ^' of the Condensation of Oxaloacetate and Acetyl-CoA Highly

Why is the $\Delta$ G $\degree$ ^' of the condensation of oxaloacetate and acetyl-CoA highly favorable?

A) The addition of inorganic phosphate provides energy, resulting in the highly favorable nature of this reaction.
B) Allosteric regulations of the reaction cause a release of energy, making the reaction thermodynamically favorable.
C) The iron-sulfur cluster in the enzyme reduces the activation energy of the reaction, resulting in the favorable $\Delta$ G $\degree$ ^' .
D) The hydrolysis of the thioester bond in citryl-CoA results in the highly exergonic reaction.