Laterally supported pier foundations support a 1 storey house. 200 mm x 210 mm concrete piers  spaced 3.0 m apart support the principal framing members. The 200 mm thick footings supporting  the piers are located 900 mm below the base of the piers. Based on the prescriptive requirements in  Div. B, 9.15., the maximum permitted height of the piers measured from the top of the footing to  the underside of the principal framing members is

(a) 600 mm
(b) 1300 mm
(c) 1500 mm
(d) 1330 mm