Multi-choice problem: Continue writing the next sentence in this paragraph:

How to effectively observe a usability test
Follow your script.
Do not deviate from this. Otherwise you run the risk of interjecting your opinion into the test.

OPTIONS:
a). Watch the body language as the subject interacts with their task. Are they following the instructions word for word? Do they look confused? Are there any hesitations before or after completing a step? Ask the participant to say out loud what they are thinking..
b). ( if you get asked anyway, relax. ) that said, avoidance of your cover letter is always easier said then done..
c). Discussing what you prefer in a potentially offensive situation can result in your teacher using inappropriate or inaccurate information about you. Instead of getting upset, simply establish yourself as a knowledgeable, sound student who has a valid core belief and a wise idea about your reasoning..
d). Have a script in place, where you can remember to return to your script to confirm your thought. The script should include three lines that are commonly used in a given situation..
a).