Yes, the context influences meaning, so it's true.
I believe it is going to be C but I may be incorrect.
The troposphere is the lowest level of the atmosphere, so it is in contact with the Earth's surface. In contrast, the stratosphere is located above the troposphere, so it is not in contact with the Earth's surface. ... The air density and air pressure are much lower in the stratosphere.
Answer:
B - occurence
Explanation:
A synonym for the word phenomenon would be, occurence because it is something that happened.
