Which concrete detail is most relevant to Frederick Douglass's autobiography?

A.
The man who helped us ashore said we were the fifth boat to land on Smith's Wharf that day.

B.
The mush was put into a large wooden tray, or trough, and set down upon the ground.

C.
The Great House had five bedrooms and two kitchens — one inside and one outside.

D.
The pants Master Daniel wore most were were light gray.

D. The pants Master Daniel wore most were were light gray.

This concrete detail is most relevant to Frederick Douglass's autobiography because it provides specific information about the clothing worn by one of the characters in the narrative, potentially illustrating the social and economic differences between the enslaved and the slaveholders. The clothing choices and distinctions between the enslaved and the slaveholders are significant themes in Douglass's book.