Consider these relations:

Emp$($eid: integer, ename: string, sal: integer, age: integer, did: integer$)$

Dept$($did: integer, budget: integer, floor: integer, mgr eid: integer$)$

Salaries range from $$10,000$ to $$100,000,$ ages vary from $20$ to $80.$

which of the listed index choices would you choose to speed up the query?

Query: Print ename, age, and sal for all employees.

Group of answer choices

Clustered B$+$ tree index on fields of Emp.

Clustered hash index on fields of Emp.

Unclustered B$+$tree index on fields of Emp.

Unclustered hash index on fields of Emp.