Neither Jenny nor Marcus was impressed by the fact that most doctors consider ice cream, artificially colored foods, and cold cuts extremely unhealthy.
Explanation:
Neither Jenny nor Marcus <u>were</u> impressed by the fact that most doctors consider ice cream, artificially colored foods, and cold cuts extremely unhealthy
this is false sentence because both jenny and marcus are singular so singular word that is <em>was</em> instead of <em>were</em> goes with them