Answer: informational question
Step-by-step explanation:
The kind of question Abel asked baker is known as an informational question.
Informational questions are usually used by interviewers during an interview to get first hand informations from the individual being interviewed. This kind of information can be classified as a primary source as they are gotten directly from the person who has had the experience or involvement. Just like in the case of Baker he was asked the question because it’s believed he witnessed the development of the controls.