The statement A. Grayson is underemployed best describes the Grayson's situation.
Step-by-step explanation:
A person is said to be underemployed if he works for low wage or works for the job that does not make use of his skills.
Underemployment occurs due to excess of labor availability in-spite of work demand. The technological change may also cause underemployment. Underemployment causes due to decline in the economy.
In the above scenario, Grayson was underemployed due to downturn in the economy. He previously worked as a field technician but he was laid off due to decline in economy. Later he was appointed as stock employee at Home Depot.