【简答题】When I was seven, my parents gave me a doll, a doll’s house and a book. The Ar Nights, came wrapped in red paper. I was just ready to read when my mother walked into my room. “Isn’t your doll jus...
【单选题】Tammy buys four Barbie dolls a year if the price of a doll is $12 per doll. The actual price of a Barbie doll is $13 per doll. The four dolls Tammy buys if the price is $12 are her
A.
demand for Barbie dolls.
B.
quantity demanded of Barbie dolls when the price is $12 per doll.
C.
quantity demanded of Barbie dolls when the price is $13 per doll because the price is $13 per doll.