Indexes can usually be created for both primary and secondary keys.

Answer: Option A

Option A: True - Indexes can indeed be created for both primary keys and secondary keys in SQL. Indexes improve the speed of data retrieval operations on a database table by providing quick access to rows based on the indexed columns.

Conclusion:
The statement "Indexes can usually be created for both primary and secondary keys" is Option A: True. Therefore, the correct answer is True.