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    Question

    Select the most appropriate option that can substitute the bold segment in the given sentence.

    It is important for students to improve their skills

    into mathematics to enhance their problem-solving abilities.
    A of Correct Answer Incorrect Answer
    B under Correct Answer Incorrect Answer
    C on Correct Answer Incorrect Answer
    D in Correct Answer Incorrect Answer

    Solution

    The phrase "skills in mathematics" correctly uses the preposition "in" to indicate the subject area where students need to improve their skills. The preposition "in" is appropriate for denoting the domain or field of expertise. The other options—"of," "under," and "on"—do not fit the context: "of" is used to show possession or association, not for indicating the subject area. "under" implies a different context, often indicating something beneath or subject to authority. "on" typically indicates the topic of discussion or focus but is less precise than "in" for describing a field of study. Thus, "in" is the most suitable preposition for the given context.

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