On November 1, 20X8, your calendar year company pays $1,200 for 12 months' insurance, recording it as an expense. Just before closing the books, you realize that no adjusting entry was made. The correct entry must:

a) credit an asset account for $1,000

b) credit an expense account for $1,000

c) debit an expense account for $200

d) debit an asset account for $200