求助！OG12阅读，VCR的一个选项结构清奇

狈狈比比多味豆

The author implies that one way that VHS producers won control over the VCR market was by

(A)           carefully restrictingaccess to VCR technology

(B)           giving up a slight earlylead in VCR sales in order to improve long-term prospects

(C)           retaining a strictmonopoly on the production of prerecorded videotapes错

(D)           sharing control of themarketing of VHS format VCRs   这句话为什么不通…，请问VHS format VCRs这三个词都是名词吗？

(E)           sacrificingtechnological superiority over Beta format VCRs in order to remain competitivein price

多谢各位大神指点！

狈狈比比多味豆

Even when no unfair practices are alleged, the simple claim that an industry has been injured by imports is sufficient grounds to seek relief.grounds是名词还是动词？？

狈狈比比多味豆

第一个问题，智障！就是那种格式的VCR嘛；
第二个：名词啰
sufficient ... for sth.
there is sufficient evidence/grounds to do...
【ground】
1. You can use ground to refer to a place or situation in which particular methods or ideas can develop and be successful.
2.If something is grounds for a feeling or action, it is a reason for it. If you do something on the grounds of a particular thing, that thing is the reason for your action.