When the value of a field of an account record is updated, which method will update the value of a custom field opportunity? Choose 2 answers.

Using the Schema Builder, a developer tries to change the API name of a field that is referenced in an Apex test class.
What is the end result?

Cloud Kicks Fitness, an ISV Salesforce partner, is developing a managed package application. One of the application modules allows the user to calculate body fat using the apex class, Bodyfat, and its method, calculateBodyfat(). The product owner wants to ensure this method is accessible by the consumer of the application when developing customizer outside the ISV's package namespace. Which approach should a developer take to ensure calculateBodyFat() is accessible outside the package namespace?

A developer creates a method in an Apex class and needs to ensure that errors are handled properly.What would the developer use? (There are three correct answers.)

For which example task should a developer use a trigger rather than a workflow rule?