Read the Original Sentence Carefully, Looking for Errors:The underlined portion of this sentence contains the needlessly wordy and awkward clause "it is probable that." This is just a long way of saying probably. Also, the pronoun "it" is used to represent "management," so the insertion of the nonspecific "it" in "it is probable" is somewhat confusing as well as creating an annoying repetition.
Scan and Group the Answer Choices:(A) and (B) are distinct from the other three choices in that they duplicate the wordy "it is probable that." The other choices are quite different from each other.
Eliminate Wrong Answer Choices:
Eliminate (A) and (B). The remaining choices have no clear split, so examine each one individually.
Eliminate (C). First, it changes the meaning of the underlined clause to the complete opposite by adding the word "not." Second, this part of the sentence is now just a modifying phrase, lacking a subject and verb. The non-underlined part of the sentence is a dependent clause starting with "Because," so there is now no independent clause and this sentence is a fragment.
Eliminate (D). It introduces the unidiomatic structure "belief on." "Belief in," as used in the original, is correct here. Also, it uses the plural pronoun "their" to mean the management's, but that noun requires the singular pronoun its.
(E) makes the underlined portion much more succinct by reducing the "it is probable that" modifier to "probably." Also, the modifier is moved to a place that makes the sentence’s meaning more clear. (E) fits perfectly into the original sentence and is the correct answer.
TAKEAWAY: Shorter is better on the the GMAT. If you're unsure where to begin, start with the shortest choice and carefully fit it into the original sentence. If it retains the meaning of the original and is grammatically correct, it is the correct answer.