Its just C.
The sentence that uses the bolded word correctly is the first one: "The caustic, bitter remarks about the company CEO in the newspaper were obviously slanderous".
Explanation: The word "slanderous" is an adjective used to describe something as false and malicious. In this sentence, "slanderous" is characterizing "remarks", a noun that is also being premodified by "caustic" and "bitter". Therefore, the use of "slanderous" is coherent since this word is related to the context of the sentence. In contrast, "clamorous" has not been correctly used because the noun that is modifying is also being premodified by "peaceful", which is opposite in meaning to "clamorous". Moreover, "beseeched" and "recompense" do not fit in their sentences either.
The third answer is correct an unbelievable 75 - 200 million people died in the plague of the 1340s
The fourth option is the correct answer.
The fourth option uses the word "plague" in a grammatically correct way, indicating the cause of death of many people in a given year, for this reason this option is correct.
The same cannot be observed in other sentences that use words that remove the cohesion from the sentence and offer a text without coherence or meaning.
The word slanderous is defined as malicious and false. Caustic is defined as sarcastic which in turn can be false and similarly, bitter is defined as angry and hurt which in turn can be malicious.
The sentence that uses the correct bolded vocabulary word is the final sentence.
In the first sentence, the word "strained" is used incorrectly because this form of straining means to drain the water from the noodles.
In the second sentence, "clamorous" noise is loud, and for it to lull the babies to sleep would be paradoxical (meaning it would make no sense).
In the third sentence, "season" means to add a substance to the pot roast to enhance it's flavor. Draining the oil from the roast generally does not enhance the flavor.