The time in the semester to beware of losing focus (taking your eyes off the finish line) is

The answer is “mid-term”.

This is the time which is known to be the moment when one is most inclined towards losing focus. This involves two factors. One is that one thinks they have studied for half of that term while expecting that still they have the other half pending and they can cover it. This is the point when they lose focus, and the time flies.

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.

the answer would be a)henry grady because he came up with the term "new south"