Which CE function do you use?

In an SQLScript calculation view, one variable contains the records that are the result of a SELECT * statement from a database table with 10 fields. You want to use this variable to populate a new variable with the same result set restricted to 1 of the 10 fields.

Which CE function do you use?
A . CE_CALC
B . CE_COLUMN_TABLE
C . CE_AGGREGATION
D . CE_PROJECTION

Answer: D