A 1-to-1 join between two equally sized datasets with perfect key matches yields an output that has what relationship to the inputs?

A 1-to-1 join between two equally sized datasets with perfect key matches yields an output that has what relationship to the inputs?

• A. The output will have the same number of features as each input dataset.
• B. The output will be the product of the input sizes.
• C. The output will be the sum of the input sizes.
• D. The output will be double the input size.

Answer: (A)