Q: Fact 1: Antigens are molecules that the immune system recognizes as foreign to the body. Fact 2: Antigens prompt the body to produce antibodies. Given the two facts above, antigens are molecules that prompt the what of antibodies?

pick from the following.
[1]. termination;
[2]. failure;
[3]. humans;
[4]. decrease;
[5]. production;
[6]. anemia;
[7]. rapid expansion;
[8]. kinetic;
The answer is:
[5].