B. It's union of thought and passion. Modernists didn't really like that the metaphysical poets were trying to use logic to prove love, they thought that emotions couldn't be explained by logical and reason, that they were irrational etc.
Modernist poets were particularly enthusiastic about seventeenth-century Metaphysical poetry due to its intellectual complexity and the union of thought and passion. These characteristics influenced modernism's exploration of human experience and emotional depth. Therefore, the best choice is (D) Both A and B.
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