If you put a list of bulleted, single-sentence questions and clearly state at the top something like “please answer the below questions” you will get your answers. Just have to make it really explicit and obvious that you expect each one answered
>>evanco+(OP)
Managers, or really anybody higher then you in the hierarchy, will still ignore the rest of the questions. Remember there's no consequences that they can perceive for only sending you a third of an answer.