关于一道阅读题的困惑（星尘）

ad9075UID: 3423773

这道题是从36套里来的。。
The dark regions in the starry night sky are not pockets in the universe that are devoid of stars as had long been thought. Rather, they are dark because
Line of interstellar dust that hides the stars behind it.
5 Although its visual effect is so pronounced, dust is only a minor constituent of the material, extremely
low in density, that lies between the stars. The average density of interstellar material in the vicinity of our Sun is 1,000 to 10,000 times less than the best terrestrial
10 laboratory vacuum. It is only because of the enormous interstellar distances that so little material per unit of volume becomes so significant. Optical astronomy
is most directly affected, for although interstellar gas is perfectly transparent, the dust is not. (125 words)



2. It can be inferred from the passage that it is because space is so vast that
(A) little of the interstellar material in it seems substantial (B) normal units of volume seem futile for measurements
of density
(C) stars can be far enough from Earth to be obscured
even by very sparsely distributed matter
(D) interstellar gases can, for all practical purposes, be
regarded as transparent
(E) optical astronomy would be of little use even if no
interstellar dust existed

我选的是A，因为我觉得A就是原文里“ It is only because of the enormous interstellar distances that so little material per unit of volume becomes so significant.” 的替换。可答案选的是C，大家是怎么看的？

蒙睿_corlenoUID: 3366900

你位置是找对了的，但注意逻辑，文中是说由于远，所以尽管密度小也很显著，从而强调的不是中间物质的物质性，而是其带来的效果显著（即看不清）