You are a global admin in a company with a Microsoft 365 E5 subscription. You are configured the following Data loss prevention policy rules: 
Rule 1: Notify users, restricts access, allows overrides 
Rule 2: Notify users 
Rule 3: Notify users, restricts access, does not allow overrides 
Rule 4: restricts access 
Rule 5: Notify users, restricts access, does not allow overrides 
If content is matching all the rules above, which rule will be enforced?

Answer options:

A.Rule 1
B.Rule 2
C.Rule 3
D.Rule 4
E.Rule 5

Correct Answer: C 
Data loss prevention rules are processed in priority order, so the first rule created will be processed first (Rule 1). But in this scenario the content is matching all the rules. In those situations, the most restrictive rule with the highest priority will be enforced. Here Rule 3 will be enforced because it is the most restrictive together with Rule 5 but has a higher priority.
Reference: 
To know more about DLP policies, please refer to the link below: 

https://docs.microsoft.com/en-us/microsoft-365/compliance/data-loss-prevention-policies?view=o365-worldwide