Which of the Following Best Explains the Energetically Favorable Formation $\Delta$

Which of the following best explains the energetically favorable formation of UDP-glucose in the liver and muscle?

A) " $\Delta$ G°' for the reaction glucose-1-phosphate + UTP $\to$ UDP-glucose + PP_i is very negative."
B) " $\Delta$ G°' for the reaction glucose-1-phosphate + UTP $\to$ UDP-glucose + PP_i is very positive."
C) " $\Delta$ G°' for the reaction PP_i $\to$ 2P_i is very negative."
D) " $\Delta$ G°' for the reaction PP_i $\to$ 2P_i is very positive."
E) " $\Delta$ G°' for the overall reaction is very positive."