Subject performance criteria:
a. Typically involve judgements or ratings of performance
b. More quantifiable measurements of units of performance
c. None of the above
d. All of the above

Option A and B both are correct.

Explanation:

The reason is that the subject performance criteria includes both the subjective and objective criteria which includes the subjective items like ratings or judgements (Option A) and objective criteria includes quantitative measurements (Option B). So both Option A and B are correct.

answer; /// the above statement is (true); good luck

u = 30

continuing your method

= +

subtract from both sides

= - thus

= -

= ⇒ u = 30