[求助],求解一道GWD上的题

Unlike the original National Museum of Science and Technology in Italy, Where the models are encased in glass or operated only by staff members ,the Virtual Leonardo projects , an online version of museum,encourage visitors to "touch" each exhibit, which thereby activates the animated functions of the piece.

A exhibit, which thereby activates

B exhibit, in turn an activation of

C exhibit, and it will activate

D exhibit and thereby activate

E exhibit which, as a result, activates

答案是B，我选的A，请NN指点

总觉得in turn an activation of说不通。可是D选项明显两个不能平行。请高人指点。