Answer:
In the English language, the word scent is used specifically for a kind of smell that is pleasant or has fragrance.
On the other hand, in the English language, the word smell is used to describe any kind of odour. The odour might be pleasant or not pleasant. It can be good as well as bad. Smell refers to any kind of smell which our olfactory receptors can determine.
THE MITOCHONDRIA IS THE POWERHOUSE OF THE CELL
If the scientists are studying the effects of different temperatures on the processing speed of a computer chip then they would need to know the temperature inside the computer.
However, your questions doesn't include the full question text, so I cannot be sure what answer you need.
If the question is what do they need to know to do this, the answer is C.
If the question is how could they measure this when they subject the computer to different temperatures, then the answer is D.
