The War Industries Board had far-reaching powers, including the ability to a. host bond rallies. b. ban some publications from the mails. c. end daylight saving time. d. fix prices.

The ability to fix the prices of the goods has been one of the main abilities of the War Industries Board. These goods are most likely refer to the military guns, equipments, and ammunations that are used at the course of the war. Therefore, the answer to the question would be the fourth choice.