Healthy Living,a Diet Magazine,collected $240,000 in Subscription Revenue on May

Healthy Living,a diet magazine,collected $240,000 in subscription revenue on May 31.Each subscriber will receive an issue of the magazine in each of the next 12 months,beginning with the June issue.The company uses the accrual method of accounting.What is the amount of Subscription Revenue that has been earned by the end of December?

A) $100,000
B) $180,000
C) $240,000
D) $140,000