Read the following conversation and answer the question.

W: When did you become interested in collecting stamps?

M: Oh, when I was about ten years old.

W: Ten years old? So you have loved it for 9 years.

M: Yeah, it's really an exciting hobby. You know, the first postage stamps were issued in Britain in 1840.

W: Really? I didn't know that. What's on the first postage stamps?

M: Well, look, here's a picture of the first two stamps issued.

W: Oh, they both bear a picture of Queen Victoria, don't they?

M: Yes, I wish I had the originals, then I would be a wealthy man instead of a poor stamp collector.

W: But I believe collecting stamps gives you much pleasure which not all wealthy men can enjoy.

M: Yes, I do agree.

Question: How old was the man when he became interested in collecting stamps? 

- 10.

- 9.

- 12.


10.