Which of the Following Is True of the DAX Language

Which of the following is true of the DAX language?

A) If Revenue and Cost are fields in the Sales table of a Data Model,the DAX expression Profit:=Sales[Revenue]-Sales[Cost] can be used to create a new calculated column called Profit.
B) If Revenue and Cost are fields in the Sales table of a Data Model,the DAX expression Profit:=Sales[Revenue]-Sales[Cost] can be used to create a new measure called Profit.
C) It is easy to learn and master the DAX language because its functions are practically the same as Excel's built-in functions.
D) A measure created by DAX does not need to be a summarization.