Which two actions help prevent duplicate leads from being created?

Duplicate management for Leads has been Implemented at Universal Containers that it seems duplicate leads are still being created, the org Wide Default (WOD) is set to ”Private” for Leads.

Which two actions help prevent duplicate leads from being created? Choose 2 answers
A . Change the lead Matching Rule to Block on Create.
B . Change the Lead Duplicate Rule details to Bypass Sharing Rules.
C . Change OWD for Leads to Public Edit.
D . Change OWD for Leads to public Read.

Answer: A,D