At universal containers users should only see accounts they or their subordinates own. all accounts with the custom field "key customer" should be visible to all senior account managers. there is a custom field on the account record that contains sensitive information and should be hidden from all users, except 3 designated users who require view and edit access. these 3 users come from different user groups, and will change occasionally. which 3 platform security features are required to support these requirements with the minimum amount of effort? choose 3 answers
a. permission sets
b. role hierarchy
c. apex managed sharing
d. owner-based sharing rules
e. criteria-based sharing rules