ashwin is measuring the success of an email encouraging customers to upgrade the strength of their…

ashwin is measuring the success of an email encouraging customers to upgrade the strength of their passwords. which of the following actions will tell him if people understood the message?\nmeasuring the number of customers who visit their account settings\nmeasuring the amount of customers that changed their passwords\nmeasuring the number of emails opened
Answer
Brief Explanations:
The goal is to upgrade password strength. Changing passwords directly shows that customers understood the message to upgrade password strength. Visiting account - settings may not necessarily mean password upgrade, and email open rate only shows if the email was opened, not if the message was understood and acted upon.
Answer:
Measuring the amount of customers that changed their passwords