Can you explain.

During Sept., by the Book Co. collected $1,800 cash from a customer for services to be provided during November. Which of the following statements about this transaction is correct?

A. $1,800 of revenue should be recorded i n September.

B. $900 of revenue should be record in September and $900 in November,

C. $1,800 of revenue should be recorded in November.

D. No revenue should be recorded for these events because they relate only to the balance sheet