(单选题)
In the first line of the last paragraph, “one interesting thing” refers to the fact that ________.( )

(本题2.0分)
A、 there are hundreds of kinds of cold viruses
B、 your body does everything to kill the cold
C、 scientists haven’t found a cure for the common cold although they can send a man to the moon
D、 some scientists think that taking medicines might be bad for your recovery from the cold