Answer:

c. 1,2,5,

Step-by-step explanation:

factors of20 - 1,2,4,5

factors of 30 - 1,2,3,5,6,10

the common factors are: 1,2,5

Answer: C. 1,2,5

Step-by-step explanation: The common factors of 20 and 30 are 1,2,5, and 10.

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