Which of the following are NOT properties of Cobb‐Douglas production function?

A. Cobb‐Douglas production function is a homogeneous production function

B. Curves representing average and marginal productivity of inputs are not downward sloping

C. Marginal productivity of labour and capital in Cobb‐Douglas production function are functions of the capital‐labour ratio

D. Iso‐quants of Cobb‐Douglas production functions are positively sloped

Choose the correct answer from the options given below: