OFFICIAL EXPLANATION
Despite their friendly and amusing appearances, adult chimpanzees, having up to five times the upper-body strength of an adult human, are still known to act aggressively towards human owners.
A. Despite their friendly and amusing appearances, adult chimpanzees, having up to five times the upper-body strength of an adult human, are still
This answer choice is stylistically flawed. Using both Despite and still, which are both opposition words, creates Redundancy. The use of a Double conjunction or phrase is one of the specific redundancies that should always be corrected.
What helps us identify this Redundancy is the following Stop Sign: Though/Although/Even though/Despite/In spite of... later followed by but/yet/however/still/neverthelessB. Adult chimpanzees have up to five times the upper-body strength of an adult human, and despite their friendly and amusing appearances, are still
This answer choice repeats the original Stylistic flaw. Using both Despite and still, which are both opposition words, creates Redundancy. The use of a Double conjunction or phrase is one of the specific redundancies that should always be corrected.
What helps us identify this Redundancy is the following Stop Sign: Though/Although/Even though/Despite/In spite of... later followed by but/yet/however/still/neverthelessC. Despite their friendly and amusing appearances, adult chimpanzees, having up to five times the upper-body strength of an adult human, are
This answer choice corrects the original Redundancy by not using two opposition conjunctions or phrases to describe a relationship between the two parts of the sentence.D. Adult chimpanzees have up to five times the upper-body strength of an adult human, and despite their friendly and amusing appearances, is
While this answer choice corrects the original Redundancy by not using two opposition conjunctions or phrases to describe a relationship between the two parts of the sentence, it is grammatically incorrect. The plural subject chimpanzees does not agree with the singular verb is.
What helps us identify this question as a Subject Verb Agreement question as well as identify the mistake is the following Stop Sign: A long complex subject / a long distance between the subject and the verbE. Despite its friendly and amusing appearance, the adult chimpanzee, having up to five times the upper-body strength of an adult human, are
While this answer choice corrects the original Redundancy by not using two opposition conjunctions or phrases to describe a relationship between the two parts of the sentence, it is grammatically incorrect. The singular subject chimpanzee does not agree with the plural verb are.
What helps us identify this question as a Subject Verb Agreement question as well as identify the mistake is the following Stop Sign: A long complex subject / a long distance between the subject and the verb