which one of the following sentences contains an unnecessary word?

A.Why don't you leave before the crowd arrives

B.The snake raised up its head and struck

C.She left early, thoguh he told her not to.

D.Rich was angry, but he concealed his feelings

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There is no need for up in sentence B because if the snake raised its head it is understood that it is up.

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To identify the sentence that contains an unnecessary word, we can examine each option and determine if one of the words can be removed without altering the meaning of the sentence.

A. "Why don't you leave before the crowd arrives."
In this sentence, each word appears to be necessary to convey the intended meaning. There is no unnecessary word in this sentence.

B. "The snake raised up its head and struck."
Likewise, in this sentence, all the words seem essential. No unnecessary word is present.

C. "She left early, though he told her not to."
Upon analyzing this sentence, we notice that the word "though" is an unnecessary word. It does not alter the meaning if removed. The sentence would read as follows: "She left early, he told her not to."

D. "Rich was angry, but he concealed his feelings."
Similarly to the previous options, all the words in this sentence appear to be necessary. No unnecessary word is present.

Therefore, the sentence that contains an unnecessary word is C. "She left early, though he told her not to."