2. Below are 4 sets of positive integers:
(1) multiples of 3 from 1 to 101;
(2) multiples of 4 from 1 to 101;
(3) multiples of 5 from 1 to 101;
(4) multiples of 6 from 1 to 101.

Among them, the set with the largest average is ( ).
(A)(1)
(B)(2)
(C)(3)
(D)(4)
2.C.

It is easy to know that the average value of multiples of 3 in 1 101 is $\frac{3+99}{2}=51$; the average value of multiples of 4 is $\frac{4+100}{2}=52$; the average value of multiples of 5 is $\frac{5+100}{2}=52.5$; the average value of multiples of 6 is $\frac{6+96}{2}=51$.