If `c lt a lt b lt d`, then roots of the equation `bx^(2)+(1-b(c+d)x+bcd-a=0`
A. are real and one lies between `c` and `a`
B. are real and distinct in which one lies between `a` and `b`
C. are real and distinct in which one lies between `c` and `d`
D. are not real