Which of the following is true for a bus impedance matrix ?

(A) It is sparse

(B) It has diagonally dominant elements

(C) It is the inverse of the bus admittance matrix

(D) Each element of it is the reciprocal of the corresponding element in admittance matrix

(A) It is sparse

(B) It has diagonally dominant elements

(C) It is the inverse of the bus admittance matrix

(D) Each element of it is the reciprocal of the corresponding element in admittance matrix