Which of these businesses are in monopolistic competition?
a
Two clothing shops, one selling women's clothing and the other selling kids' clothing
b
Two agricultural producers, each selling a variety of kinds of citrus fruit
c
Two pet stores, one of which sells dog products and the other of which sells bird products
d
Two phone providers, each offering benefits to customers who switch to its service
a
Two clothing shops, one selling women's clothing and the other selling kids' clothing
b
Two agricultural producers, each selling a variety of kinds of citrus fruit
c
Two pet stores, one of which sells dog products and the other of which sells bird products
d
Two phone providers, each offering benefits to customers who switch to its service