Your friend wants to have her DNA tested because she thinks it will help her identify what foods she should eat. What is your advice to her?

A  She should be sure to purchase any special foods or supplements the testing company suggests.

B  Test quality and validity and the proper use of results are guaranteed by the FDA.

C  Links between specific genetic variations and chronic disease are already well defined and useful recommendations are available to consumers.

D  Her DNA results will be misused if she submits to the test.

E  Potential interactions between environmental factors and genome variations must be pinned down before effective application of DNA assessments is possible.