In Regards to the Mechanics of Trading Futures Options, Which

In regards to the mechanics of trading futures options, which of the below statements is FALSE?

A) Upon exercise, the futures price for the futures contract will be set equal to the exercise price and the position of the two parties is then immediately marked to market based on the then-current futures price.
B) Upon exercise, the option writer or seller must pay the option buyer the economic benefit from exercising.
C) In the case of a call futures option, the option writer must pay the difference between the current futures price and the exercise price to the buyer of the option.
D) In the case of a put futures option, the option buyer must pay the option writer or seller the difference between the exercise price and the current futures price.