The correct answer is A. Debit cash $2000, credit Treasury stock common $1500, Credit paid in capital from Treasury stock $500.
To get the Debit cash we take the number of shares and multiply with treasury stock which is 100 × $20 = $2000.
To get the credit treasury stock we get the reused number of shares and multiply with the reacquired stock which is
100 × $15 = $1500.
To get the paid in capital from treasury we take the debit cash we take away the credit treasury which is,
$2000 - $1500 = $500.