which vectors are unit vectors?

The unit vectors are u = {1, 1}. Option C
Unit vectors can be defined as vector with magnitude of 1.
It is important to note that a unit vector is a vector quantity. Vector quantities are known to have magnitude and direction.
They are represented with the sign 'u'
Thus, the unit vectors are u = {1, 1}. Option C
Learn more about unit vectors here:
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