If a Blood Test Indicated That a Person Had a High

Multiple Choice

If a blood test indicated that a person had a high level of IgM antibodies in the blood,it could be concluded that:

A) the person's body is responding to a re-exposure to an antigen.
B) the person's body is responding to the initial exposure to an antigen.
C) the person has an increasing likelihood that he will become allergic to an antigen.
D) no conclusions could be made.