Which of the following correctly compares a scientific investigation to a demonstration

Without options I can simply compare a scientific investigation to a demonstration:

An investigation is a process when you are answering a question about the answer of which you do not know while a demonstration is a display or show of how something happens, when you already know the outcome.

The  pressure is  

Explanation:

From the question we are told that

    The  volume of the container is  

     The mass of   is  

     The root-mean-square velocity is  

The  root -mean square velocity is mathematically represented as

     

Now the ideal gas law is mathematically represented as

     

=>  

Where n is the number of moles which is mathematically represented as

         

Where  M  is the molar mass of  

So  

       

=>    

=>    

=>  

substituting values

    =>    

=>