Sentence Correction (SC) | Re: Imported into Massachusetts from Europe in 1869, the gypsy moth was us

C is wrong according to me for the below two reasons
1. A prepositional phrase "To cross gypsy moths with adult silkworms" should touch what it is modifying, but in option C it is followed by a modifier.
2. We don't know what the modifier "in attempting the development of a strong strain of silk-producing insects" is modifying. It can modify the previous phrase or the following clause. Completely wrong

Although Option D is in passive voice, it is the best choice

@Experts,