He kept pace with me , for a few dozen feet and he set off my warning radar . About half way to my car , he spoke up , like we 'd been in the middle of a conversation already , when in fact we had not exchanged any words other than my mumbled " thanks " as he held the door for me on my exit from the gym . " Oh by the way , " he started out , " thanks for letting me shower next to you .

Available options:
a). He did n't see the narrator standing there ..
b). He wanted to ingratiate himself to the narrator ..
c). He is naturally chivalrous ..
d). None of the above choices ..
Q: Why did the man hold the door for the narrator ?
b).