7.
Take a look at these sentences and identify what was changed.
Although mechanical problems prevented the bicyclist from finishing first in the race, his success through determination and willpower is encouraging for others who wish to follow in that same course.
Mechanical problems prevented the bicyclist from finishing first in the race. However, his determination and willpower will encourage other cyclists.
I think it is D because the sentence that was changed is a full complete sentence now. Before it was changed it was two incomplete sentences. The subordinate clause starts with although.
