Which of the following statement is correct

Suppose that aggregate production for an economy is given by: Y = AK 0.570.5 Which of the following statements is correct?O There are constant returns to scale in A, L and K. There are constant returns to scale in L and K. O There are constant returns to scale in A and L or in A and K. O There are constant returns to scale in L alone. O There are constant returns to scale in K alone