A Gasoline Distributor Wonders Whether an Individual's Income Levels Influences $\alpha$

Multiple Choice

A gasoline distributor wonders whether an individual's income levels influences the grade of gasoline purchased.
Using $\alpha$ = .05,the observed chi-square value is ___.

A) 15.79
B) 4.44
C) 32.89
D) 51.79
E) 5.79