What is the recommended approach to format the name fields?

You are working on an IdentitySync dataflow that exports accounts. The values of the first and last name need to be lowercase.

What is the recommended approach to format the name fields?
A . Use the toLowerCase function in the Select parameter of the datasource.read.gigya.account component.
B. Use the field.flatten component.
C. Apply a custom transformation inside the record.evaluate component.
D. NO dataflow component can transform the format of a field.

Answer: C