Why is it important to use the multiple column feature of Optim masking functions (e.g., Lookup, Hash_Lookup) when using those functions to mask multiple fields in a table?

A.
Use of the multiple columnfeature makes coding a column map much easier.

B.
Use of this feature is only a matter of preference.

C.
The multiple columnfeature allows you to concatenate multiple columns into a single column.

D.
This feature significantly improves performance during the masking process.