Which sentence is an example of correct parallel structure? A The protest group that had gathered outside the hotel was loud, and they were angry. B Examples of aerobic exercises indude running, hiking, swimming biking, and walking. C Congress must either raise revenues, or it will be necessary to reduce expenses. OD The police have a duty to serve the community, safequard property.protect the innocent, and they must respect the rights of everyone.

## Step 1<br />Parallel structure, also known as parallelism, is a grammatical concept that involves using the same pattern of words to show that two or more ideas have the same level of importance. This can happen at both the word level and the clause level.<br /><br />## Step 2<br />Let's analyze each sentence:<br /><br />### Sentence A: <br />"The protest group that had gathered outside the hotel was loud, and they were angry."<br />This sentence is not parallel because "was loud" and "they were angry" are not in the same form.<br /><br />### Sentence B: <br />"Examples of aerobic exercises include running, hiking, swimming biking, and walking."<br />This sentence is not parallel because "swimming biking" is not in the same form as the other activities listed.<br /><br />### Sentence C: <br />"Congress must either raise revenues, or it will be necessary to reduce expenses."<br />This sentence is parallel because "raise revenues" and "reduce expenses" are in the same form.<br /><br />### Sentence D: <br />"The police have a duty to serve the community, safeguard property, protect the innocent, and they must respect the rights of everyone."<br />This sentence is not parallel because "they must respect the rights of everyone" is not in the same form as the other duties listed.