A local hospital tracked the blood type and gender of the patients they saw one day. Which is a fair statement?

A.
Over half of the patients seen on an average day had blood type O.
B.
Less than 1% of the patients seen on an average day had blood type AB.
C.
Double the number of patients seen on an average day had blood type O than blood type B.
D.
On an average day they will see about the same percentage of patients with types A and B.