I would choose B, but that's my opinion, so it's probably different from yours.
Answer:
“Nano” is the metric prefix for 1 x 10-9, so a nanometer (nm) is a billionth of a meter. It comes from an ancient Greek word that means “dwarf.” Nanoparticles range from 1 to 100 nm in diameter.
Explanation:
It's very cheap is a sentence. If only the courage to fail is underlined, however, then it is a noun phrase, and functions as the subject of this sentence.
Explanation:
imposed by a judge or court but not enforced as long as no further offense is committed within a specified period.
