Can changing the diet reduce high blood pressure? vegetarian diets and low-salt diets are both promising. men with high blood pressure are assigned at random to four diets: (1) normal diet with unrestricted salt; (2) vegetarian with unrestricted salt; (3) normal with restricted salt; and (4) vegetarian with restricted salt. (a) what are the factors (explanatory variables) in this experiment? there are no factors. there is one factor: diet (normal, vegetarian). there is one factor: salt (restricted, unrestricted). there are two factors: diet (normal, vegetarian) and salt (restricted, unrestricted). there are four factors: the four diets being compared.

The correct answer is There is one factor salt(restricted, unrestricted).

Explanation:

Vegetarian diet and low salt diet are both promising in the treatment of hypertension or high blood pressure.

        In the given question there is only factor that is variable that is restricted salt and unrestricted salt .

       This is because both normal diet and vegetarian diet are same that"s the term diet is not variable.

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explanation:

i didn't have the answer choices , but i tried my best.