问道题

黑夜

　scientists have recently discovered what could be the largest and oldest living organism on Earth. A giant fungus that is an interwoven filigree of mushrooms and root like tentacles spawned  by  a single fertilized  spore some  10000 years ago  and extending for more than 30 acres in the soil of a Michigan forest.

　　A extending
　　B extends
　　C extended
　　D it extended
　　E is extending

我选了C，答案是A， spawned  要和 extended 平行并列吧 请大家分析下。

cesoir

OG10 210

Choice A, the best answer, preserves grammatical parallelism while allowing for logical expression of temporal relationships; A employs the parallel participial phrases spawned... and extending ... to modify filigree. Other choices present different grammatical constructions that are not participial modifiers and thus not parallel to spawned: extends in B is a present-tense verb; it extended in D begins a new clause; and is extending in E
ungrammatically introduces a new predicate. In C, extended is nonparallel if it is assumed to be a past tense verb form; if it is assumed to be a past participle, it illogically states, as does D, that the filigree extended only in the past.