Mark the letter A, B, C, or D to indicate the word that differs from the other three in position the of the primary stress in each of the following questions

II. Mark the letter A, B, C, or D to indicate the word that differs from the other three in position the of the primary stress in each of the following questions.
1. A. digital                 B. personal                  C. excellent                 D. electric
2. A. deplete             B. preserve                     C. sewage                 D. pollute
3. A. awareness           B. solution                   C. importance              D. happiness
4. A. instrument          B. engineer                  C. newsletter               D. family
5.  A. volunteer           B. charity                    C. vegetable                D. injury