Question

Whenever Kylie ate a fish roll, she had a stomachache. Kylie concluded that fish rolls cause stomachaches. Which of the following statements will prove that there is a correlation and not causation between eating fish rolls and having stomachaches?

Kylie's stomachaches are not equally severe whenever she eats fish rolls.
Kylie always eats fish rolls with a sauce that causes stomachaches.
Kylie does not get stomachaches if she does not eat fish rolls.
Kylie's stomachaches are cured when she takes medicine.

Answer 1

I think it is C but I'm not entirely sure

Answer 2

if she eats the fish roll with a sauce that is known to give her a stomach ache, how can she be sure it is the fish that is making her stomach sick (and not the sauce)

Answer 3

so it is B?

Answer 4

@perl