70-459 practice - PrepKeys

Q1 Single choice

You need to add a new column named Confirmed to the Employees table. The solution must meet the following requirements: Have a default value of TRUE.
Minimize the amount of disk space used.

Which code segment should you use?

A
ALTER TABLE Employees
ADD Confirmed bit DEFAULT 0;
B
ALTER TABLE Employees
ADD Confirmed char(1) DEFAULT "1";
C
ALTER TABLE Employees
ADD Confirmed char(1) DEFAULT '0';
D
ALTER TABLE Employees
ADD Confirmed bit DEFAULT 1;