When the cross-price elasticity PX = 3:
A.
demand rises by 3% with a 1% increase in the price of X.
B.
the quantity demanded rises by 3% with a 1% increase in the price of X.
C.
the quantity demanded rises by 1% with a 3% increase in the price of X.
D.
demand rises by 1% with a 3% increase in the price of X.