Regarding class variables, what statement is accurate? a. A class variable is visible only to methods inside a class.
b. A class variable is only visible to a single instance of a class.
c. A class variable is visible to all instances of a class, but can vary from instance to instance.
d. A class variable is visible to all instances of a class, and does not vary from instance to instance.

Which of the following best describe how the depth-limited search works. a normal depth-first search is performed but the number of ply/depths is limited. a normal breadth-first search is performed but the number of ply/depths is limited. a normal breadth-first search is performed but values above a specific value will be ignored. a normal depth-first search is performed but values above a specific value will be ignored.