I will give you a straight answer and then caution you on something.
A lot of it just really depends on the call of the question. Some questions are straight forward and it will be pretty obvious what they are getting at. Some questions will be pretty open-ended like the dreaded "discuss all issues." If it is pretty obvious, you really need to discuss only what is asked because the prof obviously wanted you to only go one place and you are limited as to how much time you can spend on each individual essay.
Timing during law school exams is critical. As a pointer, when you start your exam, write down your beginning and ending times and then write down a breakdown as to how much time you will spend in each particular section and then stick to that. There is noting worse than realizing you only have 10 minutes left to do 3 more essays. If the answer is not so obvious, you might want to delve into the other issues, but make sure you discuss the most obvious ones first. Again, stick to your time.
If you want, give me a brief run-down of the facts and the actual question and I can let you know what I would do.
As caution, a lot of this will really depend on the knowledge you gain after being in class for awhile. I am not giving you a hard time about doing essays now, but much of what you think you would cover will be dependent on seeing the "big picture" in torts and understanding what kind of things or the approach your professor takes toward the topic. As a lay person and a beginning student, you will look at it much differently now than you will a few months from now. A lot of issues may seem important now that will not later. However, in the area of tort law, it is often easy to see how negligence and intentional torts would overlap.
I guess my standard answer right now is, "it really depends." As you will start to experience, that will become your mantra to almost all law school questions. So many factors can influence how a situation is addressed that it really just depends. If you change one little factor, if you use the law of one state over the other, or if the court follows the minority instead of the majority rule, it really just depends.
Post the facts and question. I will be home later today and look at it for you.