When Rolan county adopted its budget for the year ending June 30, year 1, $20 million was recorded for estimated revenues control. Actual revenues for the year ended June 30, Year 1, amounted to $17 million. In closing the budgetary accounts at June 30, Year 1,

a. Revenues control should be debited for $3 million
b. Estimated revenues control should be debited for $3 million
c. Revenues control should be credited for $20 million
d. Estimated revenues control should be credited for $20 million