What Is the Overall Standard Free-Energy Change for the Following $\rightarrow$

Multiple Choice

What is the overall standard free-energy change for the following two reactions?
A + B $\rightarrow$ C
$\Delta$ G ^° _rxn = $\Delta$ G₁
C + D $\rightarrow$ E
$\Delta$ G ^° _rxn= $\Delta$ G₂

A) ( $\Delta$ G₁ + $\Delta$ G₂)
B) ( $\Delta$ G₁ - $\Delta$ G₂)
C) ( $\Delta$ G₂ - $\Delta$ G₁)
D) ( $\Delta$ G₁ $\Delta$ G₂)
E) ( $\Delta$ G₁/ $\Delta$ G₂)