Hot-Dog Vendors on the Beach Fail to Cooperate with One

Hot-dog vendors on the beach fail to cooperate with one another on the quantity of hot-dogs they should sell to earn monopoly profits.A consequence of their failure is that,relative to the outcome the vendors would like,

A) (i) and (ii)
B) (ii) and (iii)
C) (i) and (iii)
D) (iii) only