What are the requirements of the singleton pattern?Each correct answer represents a complete solution. Choose two.This type of question contains radio buttons and checkboxes for selection of options. Use Tab for navigation and Enter or space to select the option.Aoption AIt is necessary to create prototypes for matching each state of an instance and clone them.Boption BA class must have only one instance accessible via a well$-$known access point.Coption CA class must be extensible by inheritance without breaking the pattern.Doption DA class instantiated in a system must be dynamic.