Answer:
C.will be buying shares of his company's stock
Explanation:
ESOP is short for employee stock ownership plan. The purpose of this plan is to give the employees option of buying the company's stock shares and share ownership of the company. This is issued through direct stock, profit-sharing plans or bonuses and it is made sure that the employee has complete discretion of who avails any of these options.
Therefore, when Roberto was promoted, his decision to take part in ESOP meant that the the power to buy the company's stocks and share ownership.