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You need to create the most efficient index on the table, minimize disk storage and improve reporting query performance. What should you do?

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You have a reporting database that includes a non-partitioned fact table named Fact_Sales. The table is
persisted on disk.
Users report that their queries take a long time to complete. The system administrator reports that the
table takes too much space in the database. You observe that there are no indexes defined on the table,
and many columns have repeating values.
You need to create the most efficient index on the table, minimize disk storage and improve reporting
query performance.
What should you do?
A. Create a clustered index on the table.
B. Create a nonclustered index on the table.
C. Create a nonclustered filtered index on the table.
D. Create a clustered columnstore index on the table.
E. Create a nonclustered columnstore index on the table.
F. Create a hash index on the table.
Answer: D