Contrast keywords are fairly common on GMAT Sentence Correction questions. Some of the most common words you’ll see include:
- on the other hand
- in contrast to
- different from
- as opposed to
Let’s look at an example question now
However a minimal role in causing air pollution, trash pollutes both land and sea, creates problems in wildlife habitats, and harms endangered species
D) Therefore accounting for
E ) Despite playing
Here we have the phrases “minimal role” and “trash pollutes..creates problems…harms…” which tells us we’ll need a Contrast word to open the sentence. (B), (C), and (D) do not provide a contrast, so we can quickly eliminate them.
Between (A) and (E), (E) is the better choice since “However a minimal role…” is an awkward construction. A better way to use “however” here would be: However minimal its role….