Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of primary stress A. relationship B. collaborate C. responsible D. generation

きらきら

The word that differs from the other three in the position of primary stress is B. collaborate. In this word, the primary stress falls on the second syllable: col-LAB-orate, while in the other words, the stress falls on the first syllable.