Child development

Isla has difficulty keeping her hands to herself during circletime: she is frequently poking her friends, pulling on their hair, or touching classmates in some other bothersome way.  Ms. Sarah decides to make Isla her helper during circles, having Isla hold large materials (calendar, pictures, books, etc.) with two hands.  Ms. Sarah reinforces Isla’s behavior of holding the circletime materials. What type of reinforcement is Ms. Sarah using?
Group of answer choices

differential reinforcement of alternative behavior (DRA)

differential reinforcement of incompatible behavior (DRI)

differential reinforcement of lower levels of behavior (DRL)

differential reinforcement of other behaviors (DRO)