How do you calculate the processing time from the order date to the ship date?

You have two columns: order date and ship date .

How do you calculate the processing time from the order date to the ship date?
A . Use the "daynumberofyear" function after subtracting both dates.
B . Use the "daysbetween" function with order date and ship date.
C . Use the "currentdate" function and subtract the ship date.
D . Use the "isdate" function on both dates and subtract the dates.

Answer: B