As a result of collision between the taxicab owned by A and driven by B and another private vehicle owned by C and driven by his driver D, X, a passenger of the first taxicab and Y, a passenger of the private vehicle was seriously injured. Z, a pedestrian, was hit by the private vehicle as the same lost control after being bumped by the taxicab from the rear. The accident resulted to the death of Z.

a.) May both A and C raise the defense of due diligence in the selection and supervision of their drivers to be absolved from liability or damages to X? Reason.

b.) As the families of X, Y, and Z, respectively, were confused as against the person/s liable for the injuries and death brought about by the accident, they consulted you and asked legal advice as against whom they should file a case and their possible cause/s of action, if any. As their lawyer, what advice will you give to the respective families of X, Y, and Z? Discuss exhaustively.

c.) What are the possible defense/s of A, B, C, and D? Discuss exhaustively.