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    Question

     In the questions, a part of the sentence is

    highlighted. Below are given alternatives to the highlighted part which may improve the sentence. Choose the correct alternative. In case no improvement is needed your answer is (e). The scientist's groundbreaking research not only advanced our understanding of quantum physics but also has practical applications .
    A had with practical applications Correct Answer Incorrect Answer
    B had practical applications Correct Answer Incorrect Answer
    C have to practical applications Correct Answer Incorrect Answer
    D have practical applications Correct Answer Incorrect Answer
    E no improvement needed Correct Answer Incorrect Answer

    Solution

    The past tense "had" is appropriate here to match the tense of "advanced."

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