Answer: This experiment has two factors.
Explanation:
This experiment has two factors in it. These two factors are: One is normal/ vegetarian diet and other is unrestricted /restricted salt diet.
The condition that is kept in the experiment are kept varying and the results are recorded in order to check whether vegetarians can lower blood pressure by their diet or not.
So, here in the experiment there are two factors on which the experiment is based on.
A.),b.), and c.) it is considered all three
