mehaksal wrote:It may someday be worthwhile to try to recover uranium from seawater, but at present this process is prohibitively expensive.

(A) it may someday be worthwhile to try to recover uranium from seawater
// to try to recover - correct

(B) Someday, it may be worthwhile to try and recover uranium from seawater
//try and recover uranium means - try uranium and recover uranium - wrong

(C) Trying to recover uranium out of seawater may someday be worthwhile
//recover out - out is redundant
//trying - ongoing action - wrong

(D) To try for the recovery of uranium out of seawater may someday be worthwhile
// try for the recovery - wrong
//recover out - out is redundant

(E) Recovering uranium from seawater may be worthwhile to try to do someday
// meaning change - wrong

OA

Brent@GMATPrepNow wrote:If we say, It may be worthwhile to try and recover uranium from seawater, then we are saying that it may be worthwhile to perform 2 different actions: trying and recovering.

When we say, try to recover, there is only one action (try) and the infinitive to recover modifies the action of trying. What kind of trying? The trying related to recovering stuff.

Cheers,
Brent