<span>A. Either tennis balls or softballs are in the garage.</span>
Answer:A dramatic convention is a set of rules which both the audience and actors are familiar with and which act as a useful way of quickly signifying the nature of the action or of a character.
Explanation:
I used google
An example can be hot dogs and hot dog buns. If the price of one of them falls, it would lead to the product being cheaper which would increase sales, thus bringing the demand for the other one to be much higher.