Answer:
A. 2
Explanation:
Let's interpret the function.
First, let's look at the top section:
if

So, if the value of x is less than 1, to find f(x), we should add 2 to x.
Let's check if x is less than 1:

3 is not less than one, so to find f(x), we cannot add 2 to x.
The second part of the function is:
if

So, if the value of x is greater than or equal to 1, to find f(x), we should subtract 1 from x.
Let's check if x is greater than or equal to 1:

3 is greater than or equal to 1, so to find f(x), we should use x-1.

Thus, f(3) = 2; the answer is A.