Which of the following are subspaces of the vector space ofreal-valued functions of a real variables? (must select all of thesubspaces.)
A. The set of even function (f(-x) = f(x) for all numbersx).
B. The set of odd functions (f(-x) = -f(x) for all real numbersx).
C. The set of functions f such that f(0) = 7
D. The set of functions f such that f(7) = 0
