Paige Turner Publishing Receives Cash from Its Subscribers in Advance

Paige Turner Publishing receives cash from its subscribers in advance for a one year subscription.Under the revenue recognition principle,Paige Turner Publishing should recognize the revenue from the subscriptions

A) at the time the cash is received.
B) after the one year subscription has expired.
C) in equal installments over the one year subscription period,as it is earned.
D) in two equal installments,six months apart.