Questions 92-93

Three identical capacitors, each of capacitance 3.0μF, are connected in a circuit with a 12 V battery as shown above.
92 The equivalent capacitance between points X and Z is
(A) 1.0μF
(B) 2.0μF
(C) 4.5μF
(D) 6.0μF
(E) 9.0μF