Answer:
a) the liability recorded when cash was received is decreased by the adjustment for the revenue being earned
Step-by-step explanation:
When cash is received for revenue yet to be earned, it is called deferred revenue. The entries posted at this point is a Debit to Cash (an increase in cash balance) and a Credit to Deferred revenue (a liability account). When the revenue gets earned, it get recognized with a Debit to Deferred revenue (to reduce the liability as the obligation has been fulfilled resulting in revenue being earned) and a Credit to Revenue (P/L).
Hence, the right option is a) the liability recorded when cash was received is decreased by the adjustment for the revenue being earned.