Introduction:
In this question, we are asked to find the smallest even number among the given options.

Solution:

To solve this question, we need to understand what is an even number. An even number is a number that can be divided by 2 without leaving any remainder. For example, 2, 4, 6, 8, and so on are even numbers.

Now, let's look at the given options:

A. Zero: Zero is neither an even nor an odd number. It is a neutral number. Therefore, it is not an even number.

B. -2: -2 is an even number because it can be divided by 2 without leaving any remainder.

C. 2: 2 is an even number because it can be divided by 2 without leaving any remainder.

D. -4: -4 is an even number because it can be divided by 2 without leaving any remainder.

From the given options, the smallest even number is -4.

Conclusion:

The smallest even number among the given options is -4, as it is an even number that is smaller than -2 and 2.

C. 2 is the smallest even number as even numbers are the numbers which are divisible 2 and 2 is the smallest multiple of itself...