To retrieve the day of the month from the Date object, which is the code to select?

To retrieve the day of the month from the Date object, which is the code to select?

a. var date_obj = new Date(2016,1,1);

b. month_date = date_obj.getMonth();

c. month_day = date_obj.getDay();

d. month_date = date_obj.toDateString();

e. var month_day = date_obj.getDate();