Read this excerpt from Little Women.

As I went downstairs soon after, I saw something I liked. The flights are very long in this tall house, and as I stood waiting at the head of the third one for a little servant girl to lumber up, I saw a gentleman come along behind her, take the heavy hod of coal out of her hand, carry it all the way up, put it down at a door near by, and walk away, saying, with a kind nod and a foreign accent, "It goes better so. The little back is too young to haf such heaviness."

Wasn't it good of him? I like such things, for as Father says, trifles show character. When I mentioned it to Mrs. K., that evening, she laughed, and said, "That must have been Professor Bhaer, he's always doing things of that sort."

In her letter home, Jo, mentions that she “like[s] such things.” Which of the following events in Jo’s life shows her to be the kind of character who would like what she observed here?

when she sold her hair
when she edited her story to sell it for $100
when she met Laurie behind a curtain at a dance
when she convinced her sisters to include Laurie in their secret society