Let t: Rⁿ → Rᵐ be a linear transformation. If B is an ordered basis for Rⁿ, then which of the following is true?
1) t(B) is a basis for Rᵐ
2) t(B) is a basis for Rⁿ
3) t(B) is a subspace of Rᵐ
4) t(B) is a subspace of Rⁿ