Select the response that corrects the capitalization error in the sentence below? that delta plane is going to dallas, texas? delta dallas texas plz asap

Delta

All proper nouns must be capitalized including when they are used as adjectives. The word Delta is referring to the airline, not part of a river. Since Delta is the specific name of an airline it is a proper noun. In this sentence, it is being used as an adjective describing the type of plane. However, just because Delta is used as an adjective, does not mean that it shouldn't be capitalized.