Which of the Following Is True of Power Query

Which of the following is true of Power Query?

A) Power Query is just another name for the querying tools Excel has had for over two decades.
B) Power Query is an add-in,so it must first be checked in the Excel add-ins list.
C) Even with Power Query,a user must be good at the SQL querying language to import data from relational databases.
D) Power Query remembers the steps of your queries so that you can use or easily modify these queries for later uses.