The correct answer is B. 7.58.
It's because she worked 7 hours and 35 minutes.
We calculate the ratio of 35 minutes in an hour, how many is that in the ratio to 1:
35 : 60 = x : 1 => x = 0,58
We then add that to 7 hours, and we get 7,58 hours.
Hope this helps!
