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Question: topology i am thinking bde but am not sure please...

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Topology

Consider Z with the digital line topology and the partition of Z created using modulo 10 arithmetic. The partition gives the mapping: [..., -30, -20,-10, 0, 10, 20,0 { ,-27,-17,-7, 3, 13, 23, ) 3 Select each and every set that is an open set in the quotient topology on o, 1, 2, ..., 9 (there are 3 out of 5). A. 14,5) B.4,5,6 C.11,9 D. 13 E.15,6,7,8,9

I am thinking B,D,E but am not sure. Please write clearly:)

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