Answer:
B, C, and D.
Explanation:
The first option is incorrect because when you are doing theatre, you must speak loudly so everyone around can hear you. If you were to speak quietly the audience would get frustrated at their inability to hear you.
The second option is correct. If you use your real emotions, you'll be able to convey the proper emotion a lot easier. The audience needs to be able to see you feel the emotion. Using real emotion helps show it much better than faking it.
The third option is correct. Just like what was mentioned in the first answer, you need to project your voice so everyone can hear you. By speaking loudly to the back of the room, your voice can bounce off the walls, making it easier for everyone around you to hear you.
The fourth and final option is also correct. Although this one is personal preference, it certainly allows you to get your nerves out, causing you to be less scared or nervous when it comes time to perform in front of a live audience. Not to mention filming yourself will allow you to critique your actions and an expression, which can improve your skill.
So, the correct answers are B, C, and D!