The reciprocal pronouns “each other” and “one another” are used when two or more subjects in a sentence are also:

The correct answer is B. objects.

Reciprocal pronouns “each other” and “one another” are used to indicate a mutual relationship between subjects in a sentence, where the actions performed by the subjects are directed towards each other. In this context, they function as objects in a sentence. For example, in the sentence “They helped each other,” “each other” refers to the mutual action between the subjects.

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