Answer:
A and B are substitutes
Step-by-step explanation:
Cross price elasticity of demand measures the responsiveness of quantity demanded of good A to changes in price of good B.
If cross price elasticity of demand is positive, it means that the goods are substitute goods.
Substitute goods are goods that can be used in place of another good.
If the cross-price elasticity is negative, it means that the goods are complementary goods.