Hello!
This exercise asks the value of f(x) when x is a very small positive number. To solve it, we can analyze the attached graph below:
So, we are talking about the numbers that are positive and very close to 0 and its corresponding range.
I put a rectangle to show you the range (we have to analyze it).
So, let's look at it:
Each time the value of X gets closer to zero Y (or f(x)) tends to increase.
So, the answer will be the alternative C.