https://help.salesforce.com/s/articleView?id=sf.admin_userprofiles.htm&type=5 => Custom Profiles available in: Essentials, Professional, Enterprise, Performance, Unlimited, and Developer Editions => In Contact Manager and Group Edition orgs, you can assign standard profiles to your users, but you can’t view or edit the standard profiles, and you can’t create custom profiles. https://help.salesforce.com/s/articleView?id=sf.users_profiles_cloning.htm&type=5 => Custom Profiles available in: Essentials, Professional, Enterprise, Performance, Unlimited, and Developer Editions

https://help.salesforce.com/s/articleView?id=sf.admin_userprofiles.htm&type=5 => Custom Profiles available in: Essentials, Professional, Enterprise, Performance, Unlimited, and Developer Editions => In Contact Manager and Group Edition orgs, you can assign standard profiles to your users, but you can’t view or edit the standard profiles, and you can’t create custom profiles. https://help.salesforce.com/s/articleView?id=sf.users_profiles_cloning.htm&type=5 => Custom Profiles available in: Essentials, Professional, Enterprise, Performance, Unlimited, and Developer Editions

Professional Edition Org can create two custom profiles (As of Summer 21 they can create 3 custom Profiles). However when creating a second custom profile the administrator get error 'You can't add additional profiles because you reached the maximum number that you can create with this user license. So, correct B, C and D I am considering also professional edition https://help.salesforce.com/s/articleView?id=000351965&type=1

Custom Profiles available in: Professional, Enterprise, Performance, Unlimited, and Developer Editions

Answers B and D are both the same just in different order. Wasted time.

Yes. https://help.salesforce.com/articleView?id=admin_userprofiles.htm&type=5 Custom Profiles available in: Professional, Enterprise, Performance, Unlimited, and Developer Editions

Isn't professional also supporting custom profile?