The standard reaction Gibbs energy for a chemical reaction at an absolute temperature T is given by: ΔrG°=A−BT Where A and B are non-zero constants. Which of the following is true about this reaction? A. Exothermic if B<0 B. Exothermic is A>0 and B<0 C. Endothermic if A<0 and B>0 D. Endothermic if A>0