Router HW enables OSPF and router HW has the role of ABR and is configured with abr-summary, then which class LSA Will it be aggregated?

Router HW enables OSPF and router HW has the role of ABR and is configured with abr-summary, then which class LSA Will it be aggregated?
A . 1 Class LSA
B . 2 kind LSA
C . 3 kind LSA
D . 4 kind LSA
E . 5 Class LSA

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Answer: A,B