The sentence that has a pronoun-antecedent disagreement error is "Each journalist has to decide what beat they want to cover." Option A.
Since "journalist" the antecedent is singular and the pronoun "their" is in the plural form, the pronoun disagrees with the antecedent, so that, there is a pronoun-antecedent agreement error in the sentence. The way to correct the mistake is either by becoming both the pronoun and antecedent singular or plural.
The conflict between Protestants and Catholics was an open one with both sides seeking the support of the public.
The printing press became an important weapon in the Reformation.
Both the Protestant and Catholic propagandists made use of the printing press as a means of influencing the public.
Protestants used the printing press to proliferate revolutionary theological material at a popular level, while the Catholic Church produced large quantities of anti-Reformation texts.
