To attract more tourists, [u]the canton of Zurich commissioned several life-size fiberglass cow statues with chiming bells, having them decorated in a uniform pattern by local artists, and[/u] set them up on the streets of the greater Zurich metropolitan area.

A. the canton of Zurich commissioned several life-size fiberglass cow statues with chiming bells, having them decorated in a uniform pattern by local artists, and
B. the canton of Zurich commissioned several life-size fiberglass cow statues with chiming bells, they were decorated in a uniform pattern by local artists, and then
C. the canton of Zurich commissioned several life-size fiberglass cow statues with chiming bells, had them decorated in a uniform pattern by local artists, and
D. several life-size fiberglass cow statues with chiming bells were commissioned by the canton of Zurich, decorated in a uniform pattern by local artists, and then
E. several life-size fiberglass cow statues with chiming bells, commissioned by the canton of Zurich, were decorated in a uniform pattern by local artists, and they

OA is [spoiler]C[/spoiler]. [spoiler]Whether the use of "had" is right?[/spoiler]