Answer:
c. credit to Additional Paid-in Capital
Explanation:
The journal entry to record the difference is shown below:
Cash A/c Dr $75 million
To Treasury stock A/c $70 million (1 million shares × $70 per share)
To Additional paid in capital - in excess of par $5 million
(Being the issuance of treasury stocks is reported and the amount remaining is credited to the additional paid-in capital account)