A city holds U.S treasury notes as an investment in capital projects fund. during the year, the market value of the notes increases by $50,000. Of this amount,$14,000 can be attributed to a decline in prevailing interest rate and $36,000 to interest that have been earned but not yet received. As of year end, the city should recognise as revenue

a) $0

b) $14,000

c) $36,000

d) $50,000