Let `p=[(3,-1,-2),(2,0,alpha),(3,-5,0)],` where `alpha in RR.` Suppose `Q=[q_(ij)]` is a matrix such that `PQ=kl,` where `k in RR, k != 0 and l` is the identity matrix of order 3. If `q_23=-k/8 and det(Q)=k^2/2,` then
A. `alpha=0`, k=8
B. `4alpha-k+8=0`
C. det(Padj(Q))=`2^(9)`
D. det(Qadj(P))=`2^(13)`