Answer :

C.
The opposite of any negative is the positive version of that number. The opposite of any positive is the negative form of that number. Only the sign changes. 
Hope this helps!

Answer: So, Option 'c' is correct.

Step-by-step explanation:

Since we have given that

-3.3 on the number line.

We need to find the opposite of -3.3 on the number line.

The opposite of any negative integer is the positive form of that integer.

Opposite of -3.3 on the number line means (+) 3.3 on the number line.

According to given figure, we can say that

A is at (-3.3)

B is at (-2.3)

C is at (3.3)

D is at (3.9)

So, Option 'c' is correct.