Sentence Correction (SC) | Re: Often audible as screeching, track friction is created in train statio

My answer is(B) . It took me 52 seconds.

(A) As a preposition, "from" should be followed by a noun or pronoun or such phrase, not a clause ("high-temperature metals and carbon dusts interact with the rail bed").

(B) "when" is a conjunction that introduces a clause.

(C) Even without considering its meaning, this version is incorrect because
(1) A proposition phrase "in train stations" is not parallel with a clause "when ...".
(2) Even though
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