求问OG verbal分册第31题，麻烦各位了~

Nearly two tons of nuclear-reactor fuel have already been put into orbit around the Earth, and the chances of a collisioninvolvingsuch material increase greatly as the amount of both space debris and satellites continue to rise.

(A) as the amount of both space debris and satellites continue to rise

(B) as the rise continues in both the amount of satellites and space debris

(C) as the amount of space debris and the number of satellites continue to rise

(D) with the continually increasing amount of space debris and the number of satellites

(E) with the amount of space debris continuing to increase along with the number of satellites

quantity修饰方面没有问题，就是不太明白as在这里的意思，是译为“因为”么？还有with果断被排除的原因是？凭第一感觉大概知道with不合适，但是再回头想想发现也说不出十分清晰的理由，跟大家请教一下，先谢谢各位！