What was the man there to check?

Choices:
A. The utility meter.
B. He was checking if anyone was home.
C. He was there to case the house to rob.
D. not enough information
The utility meter.
I was once distinctly unsettled by a utility man who called to read the gas meter. We were living in an old house at the time and I was home alone with the youngest child (who was around six months old), balanced on my hip as I opened the door. The visitor looked genuine, dressed in the expected uniform. He was around 6.3 and probably not the most tidily presented utility man I'd met, but I believed him to be genuine and willingly invited him in out of the foul weather. It was pouring down outside, a freezing cold winter's day. As I closed the door I remembered that I should have asked to see his company I.D. , so as I opened the meter cupboard and switched on the light, I politely said, 'Oops, I should have asked to see your I.D. if you don't mind?. He stood there in front of the door and made no move to produce his card or do anything in fact. He just glared down at me in the most menacing way and said in a very sinister voice 'Isn't it a little bit late for that now? What are you going to do if I tell you I don't have it?'.
There was an embarrassed silence. He continued to stare down at me without making a move for what seemed like minutes but was probably seconds. He didn't produce his I.D., instead he almost grudgingly read the meter as I looked on and then he swiftly left without saying goodbye. I closed the door and locked it, and then took a while to get my pulse rate back to normal and to realise I'd just learned a very big lesson. Such a creepy individual, I didn't make that mistake again.