In the following questions, four sentences are given which may or may not be grammatically correct. From the given options, choose the grammatically incorrect sentence/sentences. A. North American ponds change drastically from summer to winter. B. A lot of people who work long hours opt to adopt a cat instead of a dog. C. Polar bears are an endangered species in Russia, and the federal government has refused to issue licenses to shoot them. D. More than any other city creature, rats inspire fear and disgust. Correct Answer All the given options are correct The correct answer is option 3) i.e. All the given options are correct. Key Points Let’s discuss all the four sentence : A The sentence is written in the simple present tense. The subject is plural, so only the first form of the verb is used. B The sentence is in Present indefinite Tense. The subject is third person , plural, so only the first form of the verb is used. C Present Perfect Tense is used. D Present indefinite Tense is used. The subject is plural, only the first form of the verb is used. Thus the correct answer is: All the given options are correct.