Private investment spending escalated during the post-World War II era (1945–50)

Suppose that MUx/Px exceeds MUy/Py. To maximize utility the consumer who is spending all her money income should buy:

A) less of X only if its price rises. B) more of Y only if its price rises. C) more of Y and less of X. D) more of X and less of Y.

Which of the following is not a type of "lock-in" that acts as a barrier to entry into a particular market?

A) Pricing at or below the average cost of production. B) Purchases of durable goods. C) Loyalty programs. D) Specialized suppliers.