2.Let R^2x2 denote the collection of all real 2 x 2 matrices and P denote the collection of all real polynomials. Which two of the following functions are linear operators? 

T₁:R→R,T₁(x)=2x-3 

T₂:R^2X2→R,T₂( A )=det( A ) 

T₃: R^2X2 → R^2X2, T₃( A ) = A^T - A 

T₄:P→P,T₄(f(x))=f'(x)+f(0)x for any polynomial f(x)
(A) T1,T2
(B) T1,T3
(C) T2,T3
(D) T2,T4
(E) T3,T4

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