Examine the structure of the MEMBERS table: Name Null?Type ------------------ --------------- ------------------------------ MEMBER_IDNOT NULLVARCHAR2 (6) FIRST_NAMEVARCHAR2 (50) LAST_NAMENOT NULLVARCHAR2 (50) ADDRESSVARCHAR2 (50) You execute the SQL statement: SQL > SELECT member_id, ` ` , first_name, ` ` , last_name "ID FIRSTNAME LASTNAME " FROM members; What is the outcome? 

Answer options:

A. It fails because the alias name specified after the column names is invalid.
B. It fails because the space specified in single quotation marks after the first two column names is invalid.
C. It executes successfully and displays the column details in a single column with only the alias column heading.
D. It executes successfully and displays the column details in three separate columns and replaces only the last column heading with the alias.

D