A and B complete a work in 8 days. A alone can do it in 16 days. If both together can do the work in how many days?	Choose the correct answer.
A) 3.75 days  B) 3.78 days  C) 5.3 days  D) 3.15 days  E) 2.75 days

Rationale: "1 / 8 + 1 / 16 = 3 / 16 16 / 3 = 5.3 days answer : c"
Answer: C