Under Perfect Competition in All Markets and with an Absence

Under perfect competition in all markets and with an absence of externalities, which of the following is false?

A) As long as all firms have access to the same factor markets and the same factor prices, the last unit of a factor hired will produce the same value in each firm.
B) Households will buy a good as long as the good generates utility that is greater than the good's market price.
C) What is produced is distributed efficiently, but the market may not produce the things that people want.
D) Resources are allocated efficiently among firms.