We are reviewing the three "Non Parametric tests"

What level of significance would I have to test for the problem below and why?

A researcher is examining preferences among four new flavors of ice cream. A sample ofn= 80 people is obtained. Each person tastes all four flavors and then picks a favorite. The distribution of preferences is as follows. Do these data indicate any significant preferences among the four flavors using the chi-square test?

Ice Cream Flavor A B C D 12 18 28 22