Which statement best explains the benefit of filtering data at the reader stage using a WHERE clause rather than filtering after reading with a Tester?

Which statement best explains the benefit of filtering data at the reader stage using a WHERE clause rather than filtering after reading with a Tester?

• A. It reduces unnecessary data I/O by not reading filtered data.
• B. It reads data and then filters, which can be slower.
• C. It is compatible with all databases.
• D. It eliminates the need to set any filter.

Answer: (A)