If Both the Supply and the Demand Curves Shift to the Right

If both the supply and the demand curves shift to the right:

A) equilibrium price and equilibrium quantity both increase.
B) equilibrium price increases and the effect on equilibrium quantity is indeterminate.
C) equilibrium quantity increases and the effect on equilibrium price is indeterminate.
D) the effect on both equilibrium price and equilibrium quantity is indeterminate.