Which One of the Following Statements Is Most Likely to Keep

Which one of the following statements is most likely to keep students' anxiety about a classroom assessment at a facilitative level?

A) "On Friday,we'll have a quiz on what we've covered this week. It should give us all feedback about how well you're learning and what things we still need to work on as a class."
B) "We're having a quiz this Friday so that I can evaluate how well you know the material we've covered."
C) "This Friday we will be having our usual Friday spelling test. It's extremely important that you get all your spelling words right,so I expect you to study hard this week."
D) "This Friday we will be having a quiz in French. Your performance will help me decide which of you will be eligible for the school trip to France next summer."