Which of these would a structural linguist have a problem with? the rule against ending a sentence with a preposition, the use of nonstandard English, the idea that language is systematic, the definition of a noun as a "person, place, or thing"

The best answer to the question above would be the first statement. The use of nonstandard English would spark a problem to a structural linguists because some grammatical structures are altered whenever one uses nonstandard or substandard English.