This doesn't strengthen the argument. This only tells us that most people are probably already eating some amount of wholesome foods, since people choose foods based primarily on taste. This doesn't tell us whether emphasizing the flavor of these foods will help nutritionists encourage people to eat even more wholesome foods. Since people are already aware of the flavor of these foods, maybe emphasizing the flavor will be less effective than emphasizing nutrition, since it isn't telling people anything new.

This doesn't tell us anything new. We know people generally choose based on flavor more than nutrition.

This doesn't strengthen the argument. Knowing that emphasizing nutrition has been moderately successful doesn't tell us whether emphasizing flavor will be even more successful.

If anything, this would weaken the argument. If more nutritious foods are generally viewed as less flavorful than less nutritious foods, emphasizing the \"true\" taste of nutritious foods, which people already think isn't as good, might not encourage people to eat them more.

This strengthens the argument. If people are more likely to try and enjoy foods they’re told are flavorful than foods they’re told are nutritious, it seems like a good idea for health experts to emphasize flavor over nutrition when encouraging people to eat wholesome foods.