The author claims food allergies are becoming more common. How effectively does the author support this claim?

A
The author effectively supports this claim by citing a study by a group of allergy experts showing how allergies have increased.
B
The author effectively supports the claim by describing their own firsthand experience in dealing with food allergies.
C
The author does not effectively support the claim because some of the evidence suggests that food allergies are decreasing.
D
The author does not effectively support the claim because the author only mentions the claim without evidence to back it up.