WORKBENCH REPORTS #$30$ A report author creates a Workbench report listing hospital encounters. This report contains a PAF column $($R PAF $7869)$ to display each patient's age at time of admission. This column retrieves the patient's birth date $($I EPT $110)$ and admission date $($I EPT $18850)$ to calculate the age at time of admission. If the author creates a summary showing a unique count of Patient MRNs $($I EPT $2061)$ grouped by column $7869,$ which of the following best describes how the encounters will be grouped? SELECT ONE OF THE FOLLOWING $(1$ PT$).$ A$.$ By the value stored in patient birth date $($I EPT $110)$ B$.$ By the value stored in patient MRN $($I EPT $2061)$ C$.$ By the value stored in admission date $($I EPT $18850)$ D$.$ By the value displayed in column $7869$ "age at time of admission"