[NTG-context] Multiple Choice Quiz with self marking funciton

Hi, I am new to ConTeXt but have been using LaTeX for years. Just before I came across ConTeXt, I ran across Acrotex eDucation Bundle. One of its packages allows us to create multiple choice quizzes which has some self-harming features when done on screen. It also has a paper equivalent. I am wondering if anyone is willing to share his/her setups for multiple choice, with or without the self-harming feature. I am also wondering if ConTeXt has that self-harming feature too. If it can, I hope too see an example of how it can be done. Many thanks in advance. May you be well and happy!B.A.