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

Multiple Choice

A gasoline distributor wonders whether an individual's income level influences the grade of gasoline purchased.The following is a contingency table from a random sample of 300 individuals.
Using $\alpha$ = .05,observed chi-square value is ______________.

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