List the like terms of the expression.-6a - 4b - 2b + 3a
A. -6a and - 4b are like terms
- 2b and 3a are like terms
B. There are no like terms
C. -6a, 3a, - 4b and - 2b are like terms
D. -6a and 3a are like terms
- 4b and - 2b are like terms
Answer: D
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