Answer:
A. choosing the grant date of a stock option retroactively
Step-by-step explanation:
Stock options are the priviledge that an individual has to purchase a stock at a particular time and date.
Usually it is given to those that already have shared.
Companies give this priviledge to existing shareholders to reduce stock dilution.
Backdating of stock options means that the options grant date can be altered to a time when the option price was lower.
In effect those that practice this get stock at lower prices and make more profit per share.
The grant date is chosen retroactively