Which Statement Best Describes the Impact of the Canadian Folic

Which statement best describes the impact of the Canadian folic acid fortification program on neural tube defects?

A) Folic acid was added to white flour,cornmeal and pasta,but neural tube defects were only modestly reduced.
B) Folic acid was added to white flour only and neural tube defects were only modestly reduced.
C) Folic acid was added to white flour only and neural tube defects were substantially reduced.
D) Folic acid was added to white flour,cornmeal and pasta,and neural tube defects were substantially reduced.