You have a single CLR assembly in your database. The assembly only references blessed assemblies from the Microsoft .NET Framework and does not access external resources.
You need to deploy this assembly by using the minimum required permissions. You must ensure that your database remains as secure as possible.
Which options should you set?

A.
PERMISSION_SET = SAFE
TRUSTWORTHY ON

B.
PERMISSION_SET = SAFE
TRUSTWORTHY OFF

C.
PERMISSION_SET = UNSAFE
TRUSTWORTHY ON

D.
PERMISSION_SET = EXTERNAL_ACCESS
TRUSTWORTHY OFF