Suppose my demand curve for a rare painting is vertical this

Suppose my demand curve for a rare painting is vertical. this means that:

A. I am willing to pay any price for this rare painting
B. none of the above
C. I am willing to pay a fixed price for this rare painting

The correct answer is A. A vertical demand curve means totally inelastic demand and so any price can be paid while demand is fixed. The correct answer is A.