Help me please i don't undertand

B

Explanation:

It's B because B supports why the shoes could be made badly (in this case, the glue doesn't work well).

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".

c it says nothing about connecting those 2 seas.