It is the work of the official opposition research and communications people, with the supervision and involvement of the hon. member for Medicine Hat, the hon. member for Calgary Southeast, the hon. member for Prince George-Bulkley Valley and the hon. member for Battlefords-Lloydminster.
Can we infer the following?
More than two hon. members were involved and supervised the work.

pick from the following. a). Yes. b). It's impossible to say. c). No.
The answer is:
a).