Which excerpt from “i know why the caged bird sings” best justifies the inference that bailey is a supportive brother to marguerite?

another negro woman of her health and age would have been expected to carry the paper sacks home in one hand, but momma said, "sister flowers, i'll send bailey up to your house with these things."
i wanted to gobble up the room entire and take it to bailey, who would me analyze and enjoy it.
i was respected not as mrs. henderson’s grandchild or bailey’s sister but for just being marguerite johnson.
momma and bailey were waiting inside the store. he said, “my, what did she give you? ” he had seen the books, but i held the paper sack with his cookies in my arms shielded by the poems.