Answer:
A. Grayson is underemployed.
Explanation:
Underemployed defines that when a person is skilled but not able to utilize their ability and skills for some reason or not get enough money for it.
Therefore according to the given scenario, Grayson was skilled in the filed of technician but unfortunately because of economy Garyson was laid off by the company. After trying a lot to get the job in his field he was unsuccessful then he pick a job of stock employment which indicates that field is not of his use as it is of another field or Grayson is underemployed.
So, from the above description the right answer is A