On January 1st 2020, the Parent Company had a bond payable of $1000 and a discount on bond payable of $30 when Subsidiary Company purchased the Parent Company bond from Outside Company for $980. Which would be the correct worksheet entry to record the retirement of the bond?

a DEBIT: bond payable $1,000, DEBIT: loss on bond retirement $10. CREDIT: investment in bonds 980, CREDIT: discount on bond payable $30.

b DEBIT: investment in bonds $980, DEBIT: discount bonds payable $30. CREDIT: bond payable $1,000, CREDIT: gain on retirement of bonds $10.

c DEBIT: bonds payable $1,000, DEBIT: loss on retirement of bonds $10. CREDIT: investment in bonds $980, CREDIT: discount on bonds payable $30.

d DEBIT: investment in bonds $980, DEBIT: loss on retirement of bonds $50. CREDIT: bonds payable $1,000, CREDIT: discount bond payable $30.