I think you should explain to her what to eat/do to help her, talk about stuff that'll make her forget about it.
I recommend eating chocolate and drinking something hot, and watch or do something to forget she's on it. Oh and eating salad too, it's good to be healthy when on period.
Explanation: From that passage I just really feel like it’s C. It definitely doesn’t seem to be B. Pony boy isn’t asking Sodapop for advice in this passage, he’s more of just saying that Sodapop is a fun guy to be around. Hope this helps!