Due to the
Due to the enormous coincidence of conditions that must exist to support intelligent life, many people believe that Earth is the only such planet in the universe.
A. to support
B. for the support of
C. for supporting
D. for a planet’s supporting
E. for a planet to support
How do we come down to option E?
The non-underlined part of the sentence says “Earth is the only such planet in the universe”. When you say such planet, there has to be a reference back to planet in the part of the sentence before such. Hence you are left with only D and E.
Between D and E, planet’s supporting is not the best usage as compared to planet to support
Hope this helps!