If a Chemical with a Toxicity Level of 1 Is

Multiple Choice

If a chemical with a toxicity level of 1 is mixed with a different chemical with a toxicity level of 1, the combined effect of exposure to the mixture is 2. This is an example of:

A) Chemical mixtures interacting by amplification.
B) Chemical mixtures interacting by antagonism.
C) Chemical mixtures interacting by squaring.
D) Chemical mixtures interacting by synergy.
E) Chemical mixtures interacting by additivity.