The question is divided into four parts where one of the parts may or may not contain an error. Choose the part that has the error as your answer. If all the parts are correct choose “No error” as the answer choice.
The company is proud of their (A)/ employees, and it (B)/ appreciates the support (C)/ from its dedicated staff. (D)

Correct option is A

The error lies in the part (A). The part (A) of the sentence has an error in pronoun-antecedent agreement.
The error in the original sentence is related to pronoun-antecedent agreement. Pronouns should agree in number with the nouns they replace. In the original sentence, "company" is a singular noun, and when referring to a singular entity, the pronouns "its" and "it" should be used.
Using plural pronouns like "their" and "they" with a singular noun creates a lack of agreement, and it can lead to confusion in the sentence. To correct the error, we need to ensure that the pronouns match the singular noun "company" in number, resulting in the use of "its" and "it."
Thus, the correct sentence formed will be “The company is proud of its employees, and it appreciates the support from its dedicated staff."