The helpful actions in designing and developing an app are interviewing potential users and observing users attempting to use the app. Option B is correct.
The actions that would usually be helpful in designing and developing an app are:
Interviewing potential users of the app: This helps in understanding their needs, preferences, and requirements, which can inform the design and development process. Observing users attempting to use the app: This allows for identifying usability issues, user experience problems, and areas of improvement.
Writing the entire program code before testing any parts of it (option 2) is not a recommended approach.
It is crucial to test and iterate on different components of the app throughout the development process to ensure its functionality and usability.
Hence, B. is the correct option.
--The given question is incomplete, the complete question is
"Which of the above actions would usually be helpful in designing and developing an app? 1. Interviewing potential users of the app 2. Writing the entire program code before testing any parts of it. 3. observing users attempting to use the app. a. 1 and 2 only b. 1 and 3 only c. 2 and 3 only d. 1, 2, and 3."--