Answer:
A
Explanation:
because the other are like nouns and i think themselves is right.
Answer: B
Explanation:
Your keyword is 'visual' here. The video you watched showed how some bacteria survived treatment.
Restraint and feeling of unease don't seem to fit, and I don't think speedy mode of transportation is it either.
My best guess would be A or B though.
Sorry I couldn't help more.