A .[af1(t)+bf2(t)]←→[aF1(jω)*bF2(jω)]
B .[af1(t)+bf2(t)]←→[aF1(jω)-bF2(jω)]
C .[af1(t)+bf2(t)]←→[aF1(jω)+bF2(jω)]
D .[af1(t)+bf2(t)]←→[aF1(jω)/bF2(jω)]