Every student in the journalism class has been asked to come up with ___ own idea for a new fad

O their
O his
O his or her
O they're

The correct answer is "his or her." In this sentence, the phrase "every student" indicates a singular group of individuals. When referring to a singular noun, we typically use the pronouns "his" or "her" to indicate possession. However, in order to be inclusive of all genders, some people prefer to use the phrase "his or her."

To arrive at the correct answer, we can analyze the structure of the sentence and apply grammar rules related to singular and plural nouns. By considering the context, we can determine that the noun "student" refers to each individual student in the class, and not the class as a whole. Therefore, the appropriate possessive pronoun to use is "his or her."