Concept:The word “collocation” has its primary stress on the third syllable.Explanation:Divide “collocation” into syllables: col-lo-ca-tion.In standard pronunciation /ˌkɒl.əˈkeɪ.ʃən/, the third syllable “ca” carries the main stress.The first syllable “col” has a secondary stress, not the main stress.So the correct stress pattern is coll-o-CA-tion.Answer:C. coll-o-CA-tion