Identify the word that can be formed by adding a prefix to the root word 'FORM'.

A. REFORM

Which of the following options is NOT a valid word formed from the root 'ACT'?

D. ACTUALITY

From the root 'SCRIBE', which of the following is a valid derivative?

B. SUBSCRIBE

If A is to B as C is to D, and A = 2, B = 4, C = 3, what is D?

A. 6

If ? represents addition, ? represents subtraction, ? represents multiplication, and ? represents division, what is the value of 8 ? 4 ? 2 ? 3 ? 2?

D. 12