A Woman Recently Took Up Employment in a Factory

A woman recently took up employment in a factory. She is a machinist, and for 6 hours a day she has to move a lever repeatedly, which requires that she extend and flex her right wrist joint. At the end of the second week of her employment, she began to experience pain over the posterior surface of her wrist and noticed a swelling in the area.
-The following statements concerning this patient are correct except which?

A) Extension of the wrist joint is brought about by several muscles that include the extensor digitorum muscle.
B) The wrist joint is diseased.
C) Repeated unaccustomed movements of tendons through their synovial sheaths can produce traumatic inflammation of the sheaths.
D) The diagnosis is traumatic tenosynovitis of the long tendons of the extensor digitorum muscle.