I the Student T Distribution Has a Greater Spread Than

i. The Student t distribution has a greater spread than does the z distribution. As a result, the critical values of t for a given level of significance are larger in magnitude than the corresponding z critical values.
Ii) The test statistic t has n-1 degrees of freedom.
Iii) William S. Gosset, a brewmaster, developed the t test for the Guinness Brewery in Ireland, who published it in 1908 using the pen name "Student."

A) (i) , (ii) and (iii) are all correct statements
B) (iii) is a correct statement but not (i) or (ii) .
C) (i) and, (iii) are correct statements but not (ii) .
D) (ii) and, (iii) are correct statements but not (i) .
E) All statements are false