How can this requirement be met? a universal containers would like to automatically assign a specific permission set to new users.

a. create an approval process on the user object to assign a permission set.
b. create a flow on the user object to assign a permission set.
c. create a lightning process on the user object to launch a flow.
d. create a workflow rule on the user object to assign a permission set.

C. Create a lightning process on the user object to launch a flow

D. Create a workflow rule on the User object to assign a permission set

Explanation:

We can create a workflow rule to automate processes, in this way waste less time.

For example:

We can use declarations like IF and THEN

IF the user is new THEN assign a specific permission

We can use Lightning Builder to launch a flow, in this case, we can collect data, and with that data, we can make some actions.

For example:

If we collect data from a new user, we must launch a flow to assign specific permission.

a software engineer i believe