What is the right design for this ….?

The Administrator is creating a login flow for a new application which will be deployed on Salesforce. The ….. create an automation logic to help validate the credentials and access.

What is the right design for this ….?
A . Leverage Screen Flow for displaying the input fields and custom apex triggers for the post login and process.
B . Leverage Screen Flow for displaying the input fields and for handling the post login and process.
C . Leverage Process Builder with Workflow rules for displaying the input fields and for handling the post login and process.
D . Leverage Screen Flow for displaying the input fields and autolaunched flow for handling the post login and process

Answer: B