What are the first three terms of the binomial expansion of (y^(2)-2)^(21), expressed in simplified form?
A) (y^(42)) - 42(y^(40)) + 861(y^(38))
B) (y^(42)) - 42(y^(40)) + 861(y^(36))
C) (y^(42)) - 42(y^(38)) + 861(y^(36))
D) (y^(42)) - 42(y^(38)) + 861(y^(34))
