As Long as Scarcity Exists,_____

As long as scarcity exists,_____

A) product prices play no role in consumers' utility maximization.
B) income plays no role in consumers' utility maximization.
C) income and product prices should both be considered for consumers' utility maximization.
D) consumers maximize utility by consuming all products until the marginal utilities of additional amounts are zero.
E) consumers would increase the consumption of all products as long as total utility is positive.