Explanation

Brides were much younger than grooms

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In English: we use the comparative degree to compare two objects.

In the sentence above, the brides are being compared to the grooms.

Hence, we need to use the comparative degree to fill in the blank.

Among the options provided, option b) younger is the comparative degree and hence it is the correct option.

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Other options, such as option c is not correct because it is the superlative degree.

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ND4-12-2022