Eyes make it possible to see which of the following?
a.
the size of an object
b.
the color of an object
c.
the motion of an object
d.
all of the above

D.  All of the above

Explanation:

Think about it.

Can you see how big or small an object is? Unless in very special cases, the ordinary person can.

Can you see the color of an object? Unless you are color blind (missing color recepticles in your eyes), then yes you can.

Can you see the motion of an object? Unless the object is not moving, or you cannot see, then yes.

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this allows people to make the best decision or pursue the best option. when alternatives are weighed using their advantages and disadvantages, the option whose disadvantages outweigh the advantages (based on a qualitative or quantitative analysis) are shunned while those whose advantages outweigh their disadvantages are pursued.