If a number p is prime, and 2p+4 = q, where q is also prime, then the decimal expansion of 1/q will produce a decimal with q-1 digits. If this method produces a decimal with 166 digits, what is the units digit of the product of p and q? Options
A) 1 B) 3 C) 5 D) 7 E) 9

Rationale: "1 / 6 = 0.1666666 . . . ( a repeating pattern one digit long ) a"
Answer: A