Question

Why is it important to have the international system of units?

a. it preserves the system used in england long ago.
b. it uses the smallest possible numbers.
c. its units are based on objects that vary in size.
d. it can be used by scientists everywhere.

Answer 1

the answer is letter d

Answer 2

It is important to have the international system of units 'cause it can be used by scientists everywhere around the world, and they will be able to understand each other with more accuracy.

In short, Your Answer would be Option D

Hope this helps!