Not 100% sure but B sounds the most likely from what I've read...
D. Eustress is supposed to be positive stress, helping you to be motivated and alert. Eustress can help you when you are studying for a test or in other cases where you need to succeed. With Eustress, you can be motivated to create a plan to budget your time to study for a test, or to practice for an oral presentation etc. However, if you do feel nervous, anxious, confused, you might want to consider this type of stress to be more negative than positive.
