Schliemann determined at the age of seven to find the site of ancient Troy and devoted his subsequent career to do it.

A. devoted his subsequent career to do it
B. has devoted his subsequent career to do that
C. devoted his subsequent career to such an end
D. has devoted his subsequent career for that
E. devoted his subsequent career to that end

OA is E

why is option B consider to be the correct answer. is it because of the usage of "has devoted" which best fit in.