Which of the following is a more secure way for a developer to give 3rd party apps temporary access to resources in their app, such as opening attachments in an external editor?

Which of the following is a more secure way for a developer to give 3rd party apps temporary
access to resources in their app, such as opening attachments in an external editor?

A.
Make use of grantTempAccess()

B.
Make use of per-URI permissions