what is the correct answer?

12. The following table shows the demand and supply schedules for good X.

Price ()1234567

Quantity demanded120100806040200

Quantity supplied020406080100120

Assume that supply increases by 40 units at all prices. What will be the effect on equilibrium output?

A) Rise by 40 units.

B) Rise by 60 units.

C) Rise by 20 units.

D) It's impossible to say because not enough information is given in the table