Ralph, a cash basis taxpayer, owns an office building that he leases to various tenants. During 20X8, he signed a three-year lease with a tenant and received a check for $16,000 for the following:

Rent for November 1, 2008 to October 1, 2009 $5,000
Advance rent for last three months of lease 600
Security deposit (refundable) 400

For the current year, 2008, Ralph must report income of:__________

a. $6,000
b. $5,600
c. $5,000
d. $832
e. some other amount.