The correct answer is B) Environmental factors can determine if a genetic trait becomes a health issue.
Hope this Helps!
Explanation:
because it allows you to eliminate or isolate variable/ it allows the experiment to minimize the changes in all the variables except the one being test.
I'm not gonna choose bc I'm not 100% sure either so read what's above, think it over and choose wisely
hope I helped a little and good luck :)
The Answer is....... D.) 100%.
