I want to design LQR controller for linear system I have Matrix A and B for linearized System how to choose C and D for state space?

A = [-0.0404 0.0618 0.0501 -0.0000 -0.0005 0.0000 0 0
     -0.1686 -1.1889 7.6870 0 0.0041 0 0 0
     0.1633 -2.6139 -3.8519 0.0000 0.0489 -0.0000 0 0
    -0.0000 -0.0000 -0.0000 -0.3386 -0.0474 -6.5405 0 0
    -0.0000 0.0000 -0.0000 -1.1288 -0.9149 -0.3679 0 0
    -0.0000 -0.0000 -0.0000 0.9931 -0.1763 -1.2047 0 0
    0 0 0.9056 0 0 -0.0000 0 0
    0 0 -0.0000 0 0.9467 -0.0046 0 0];

B =[ 20.3929 -0.4694 -0.2392 -0.7126
0.1269 -2.6932 0.0013 0.0033
-64.6939 -75.6295 0.6007 3.2358
-0.0000 0 0.1865 3.6625
-0.0000 0 23.6053 5.6270
-0.0001 0 3.9462 -41.4112
0 0 0 0
0 0 0 0];