How many slides should a presentation include?
a. at least one slide per minor point
b. at least one side per major point
c. almost none
d. only enough to present important information clearly

i think either b or d

D. You only really need important information in a presentation.

B.) is the correct answer I believe.
A.) is incorrect because in a presentation, a slide is organized by every major point.
C.) is incorrect because you definitely need a good amount of slides for a well-developed presentation.
D.) is incorrect because while you do need enough information to present your information clearly, the answer emphasizes the words "only enough," meaning bare minimum.

Hope this helps! (: