Answer: Credit compensation expense for $5million
Explanation: Given the condition involved in the option issue to the executive, which involves the company achieving a 10% increase in sales within the next 12 months, which at first the company believes it's achievable, and hence and hence accruing $5million in compensation expense. But since achieving that target became very unlikely after 9 months, compensation expense will have to be credited for $5million based on the most recent estimation.