Mark the letter A, B, C or D, to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions

Mark the letter A, B, C or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
6.A.geography          B. referee               C.coffee                     D.payee
7.A.volcanic             B.natural                C.tropical                   D.serious
8. A. historic  ​ B. physical           C. aquatic  ​       D. Botanical
9.A. ecology            B. environment        C. autography           D. residential
10.A. promote                B. confuse           C. rescue                     D. compose