In each of the following sentences, part or the entire sentence is underlined. The answer-choices offer four ways of phrasing the underlined part. If you think the original sentence is better than the alternatives, choose 1 which merely repeats the underlined part; otherwise choose one of the alternatives.
The rise in negative attitudes toward foreigners indicate that the country is becoming less tolerant, and therefore that the opportunities are ripe for extremist groups to exploit the illegal immigration problem.
The subject "The rise" is singular. Therefore, it should be 'indicates'. Hence, option A is not the correct answer.
We can directly rule out option C as it contains 'that' after therefore.
Between option B and D, the former is better as this shows a progressive process. As the period can't be defined. Hence, option B is the correct answer.
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