Hmm, this is a tough one. I'm going to guess B and D are the incorrect statements. PostgreSQL is open-source, so duplication is a no-brainer, but the devs have to handle all the support, not just the important issues.
This is a tricky one! I'd go with B and E as the incorrect statements. PostgreSQL can definitely be duplicated, but the developers are on the hook for all the bugs, not just the crucial ones.
I think A and C are the correct statements. PostgreSQL is free to use and redistribute, but the developers are responsible for ongoing support and maintenance.
B and D seem wrong to me. PostgreSQL is open-source, so it can be duplicated and redistributed freely, but the developers are responsible for maintenance and support, not just critical faults.
I agree, B and D are definitely incorrect. PostgreSQL's license allows for duplication and redistribution, with developers responsible for maintenance support.
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