Which two code segments will each achieve the goal?

You need to implement client-side animations according to the business requirements.
Which two code segments will each achieve the goal? Each correct answer presents a complete solution.
A. $("h1:first").fadeOut(1000);
B. $("h1: first") .animate ({ opacity: 1 });
C. $("h1: first") .animate ({ opacity: 0 });
D. $("h1:first").fadeIn(1000);