F: What do you usually do in your spare time
M: I like staying at home and DIY.
F: Woo! What do you do particularly
M: I like to make some furniture and family decorations myself.
F: How did you come to like that
M: Well, I once visited one of my friends. He did very well in decorating his own house. I came back and started my own decoration. It costs less. Now I am an expert.

What does the man mean by "DIY"().

A．Do things himself.
B．Help others.
C．Decorate his house.