All of the following statements concerning an acute gouty arthritis attack are correct except (a) The diagonosis of gout is assured by a good therapeutic response to colchicines because no other form of arthritis responds to this drug (b) To be assured of the diagnosis, monosodium urate crystals must be identified in the synovial fluid of the affected joint (c) Attacks frequently occur in the middle of the night (d) An untreated attack may last up to 2 weeks (e) The first attack usually involves only one joint, most frequently the big toe (first metatarsophalangeal joint)