Question 1(Multiple Choice Worth 2 points) (02.04 MC)

Kris spends every day of the summer swimming in the lake behind her grandparent's house. By the end of the summer, she is having daily dizzy spells, migraine headaches, and nausea. What can Kris infer about the possible
source and reason for her illness?

A: It is an acute effect of a toxin in the lake

B: It is a chronic effect of a toxin in the lake

C: It is a synergistic reaction to a toxin

D: It is an antagonistic reaction to a toxin