In each of the following questions, a sentence with four highlighted words has been given. One of these highlighted words may or may not have been used unnecessarily in the given sentences. You are required to choose the word that is redundant and gives a superfluous meaning. If all of the highlighted words are essential for the contextual meaning of the sentence, then choose option (e) as your answer choice.

The world appears to have gleaned (A) little from the first wave, which culminated (B) last year and decimated (C) the country, while a more ferocious (C) second wave is ravaging the country.

To determine if any of the highlighted words in the sentence are redundant, let us analyze the context and the meaning of each word within the sentence:

The sentence is: "The world appears to have gleaned (A) little from the first wave, which culminated (B) last year and decimated (C) the country, while a more ferocious (D) second wave is ravaging the country." (Note: The prompt labels both "decimated" and "ferocious" with "C" in the text, but the options list A, B, C, D, and None of these, representing the four highlighted words in sequence).

Let us examine the role of each highlighted word:
1. Gleaned (A): Means to extract or gather information from various sources. In this context, "gleaned little from the first wave" means the world has learned very little from the experience of the first wave of the pandemic. This word is grammatically and contextually essential.
2. Culminated (B): Means reached a climax or point of highest development, or came to a head/ended. Here, it refers to the first wave reaching its peak or concluding last year. It is necessary to establish the timeline of the first wave.
3. Decimated (C): Means destroyed or killed a large proportion of. This describes the severe impact and destruction caused by the first wave on the country. It is grammatically correct and contextually vital to show the severity.
4. Ferocious (D): Means savagely fierce, cruel, or violent. This describes the nature of the "second wave" and contrasts it as being even more intense than the first one. It is essential for the comparative description.

Since all of the highlighted words are grammatically correct, contextually appropriate, and none of them are redundant or superfluous, no word needs to be removed.

Therefore, the correct choice is "None of these".