Milky Moo and Mega Cow Are the Only Sellers of Milk

Milky Moo and Mega Cow are the only sellers of milk. Milky Moo's supply function is at prices above $0.50 and zero at prices below $0.50. Mega Cow's supply function is at prices above $0.33 and zero at prices below $0.33. At a price of $0.45

A) Milky Moo is the only supplier of milk
B) Mega Cow is the only supplier of milk
C) Both Milky Moo and Mega Cow supply milk
D) Neither Milky Moo nor Mega Cow supply milk