To give an effective oral presentation, gretchen should

Gretchen should research her project thoroughly, and keep opinions out of her presentation. She should present herself neatly, and well dressed. She should speak in a confident tone, and loud enough for every one to hear but not too loud. Her presentation should be organized, and should repeat points or move along too slowly or too fast. Her voice should be clear and easy to understand, and stuttering should be at a minimal. 

It’s either d or b ! but it might be b