Why is it important to do Year over Year $($YTD$)$ analysis of Income statement even though a firm is running month over month trend analysis?

A$)$ The month over month trend analysis captures the variances; hence, YTD analysis is not required

B$)$ YTD analysis help trace a seasonal change

C$)$ Significant variances compounded through medium scale variances every month can be spotted though YTD analysis

D$)$ YTD analysis is not important as it doesn't help to take a deeper look into business income and expenses

E$)$ Both B & C

F$)$ Both A & D