After he came to and helped the woman how long was it until he went to the restroom to investigate some things?

Choices:
A. not enough information
B. As soon as possible, just a few minutes.
C. After another employee relieved him so he could take his lunch:  it was a few hours.
D. After he helped the large crowd of many people so it was at least an hour.
As soon as possible, just a few minutes.
He had apparently spaced out for a second or two. When he came to, a large, annoyed woman was leaning in toward him. "Mister? Mister, are you even listening to me?"
He looked at the receding rows of fluorescent lights on the struts of the cavernous ceiling, the gleaming linoleum floors, the pallets of sale-priced plastic coolers and Special K and motor oil, and then he looked at the rack of merchandise at his back and understood that he was in a Wal-Mart, behind the returns counter.
He heard his own voice saying, as if by reflex, "Do you have your receipt?"
*
At the first opportunity, he locked himself in a bathroom stall and dug out his wallet. His driver's license showed the right name, birthdate, and photo, but it had been issued by the State of North Carolina, and it listed an address he'd never heard of.
He scrubbed his face at the sink. It was him in the mirror, a tanned and healthy 56, hair mostly gray but still all there. He felt groggy, as if he'd woken prematurely. It was only the numbness, he thought, that kept the panic at bay.
If he didn't push, he found he knew the answers to some questions. He was due to clock out in an hour. When he left the parking lot he would go under the highway, turn left, and merge.
*
He found his way to a battered white Toyota pickup in the employee section. The key in his pocket started the engine. He forced himself not to think too hard as he drove, taking the turns that seemed to have a certain inevitability. He wound up on a dirt road near someplace called Pittsboro, in front of a small brick house surrounded by high yellow grass, pines, and live oaks.