Question $5(2$ points$)$

Idris started going to her local BuyltAll when she received a letter congratulating her on her high school graduation and offering her a one$-$time $20\%$ off her entire purchase coupon. When she settled into her first apartment, she used the coupon and signed up for their rewards program. Idris receives intermittent coupons from BuyltAll for $$5,$$$10,$ and sometimes $20\%$ off a single purchase. She is a loyal shopper, often purchasing more than the items that qualify for her coupons. BuyltAll is using

a continuous reinforcement schedule.

an approximation sequence.

a shaping pr$$cedure$.$

reinforcement

a partial reinforcement schedule.