Jill: We need to more off-shore oil-drilling. It will greatly reduce the cost of gasoline.

Bill: The price of gasoline depends on world markets and the amount of additional oil we would get from off-shore drilling here would not be enough to affect the price of gas more than a penny.

What kind of response is this to the statement?

A. Disagreeing
B. Challenging
C. Clarifying
D. Adding