B. Their , would be the correct answer, it makes the most sense .
Answer: Was breakfast prepared by your mother?
Explanation: While in the active voice the doer of an action comes before the verb, in the passive voice the doer comes after the verb and it usually ends with the use of the word "by". In this passive voice, "was breakfast prepared by your mother", the verbs "was prepared" come before the doer "mother" and the passive voice uses the word "by".
The most likely effect of too much type on one slide during a presentation is the following: Answer A. The audience will stop listening to the presenter in order to read the slide. It's commonly know that the 70 % of the people in the world are visual learners. The auditory ability in them is about the 20 % to the 30 % of the total. If you want them to listen to you should show them just a few highlights about the theme you are talking about, just for them to focus on the subject, or you just let them read instead of continue talking otherwise you will distract them with your speech.
I think X-Ray would have to be the flat character of the movie...
You would want to target to beliefs and morals of the reader.