There are five instances of a rule in the rules cache. The only differences between these are the circumstance settings and ruleset version. The operator's access group has access to all ruleset versions.
On 1 June 2020, which instance is chosen by rule resolution if .Country = Algeria?

A. SelfService:01-01-03 (Circumstance: None, Base Rule checked)
B. SelfService:01-01-01 (Circumstance: .Country=Algeria)
C. SelfService:01-01-02 (Circumstance: Start Date = 1 January 2020; End Date = 31 December 2020)
D. SelfService:01-01-01 (No Circumstance)
E. SelfService:01-01-05 (No Circumstance)
Explanation:
On 1 June 2020, rule resolution would choose the instance of the rule that is circumstanced for Algeria, provided that the rule's availability is not blocked or withdrawn and the ruleset version is accessible by the operator's access group. The specific rule circumstanced for Algeria would take precedence over the base rule or other circumstanced rules that do not match the circumstance condition.
Reference: Pega SSA course materials on circumstancing rules.