The committee was loath to make a decision without all the pertinent information at its disposal.

The correct answer to the question "The committee was loath to make a decision without all the pertinent information at its disposal." is Option A: The committee was loath to make a decision....

The other options — B) The committee was loathe to make a decision..., C) The committee was loth to make a decision..., D) The committee was loathed to make a decision... — are incorrect for this GMAT Exam Prep question. As explained above: 'Loath' is an adjective meaning reluctant or unwilling. 'Loathe' is a verb meaning to detest. The context requires the adjective 'loath' to describe the committee's reluctance.