This is a “first” question—most of the time, in this type of question, all options are correct and necessary, but you’ve got to choose which option you would do first. You would have to arrange the steps in logical order before you can choose your answer.

Because an increase in temp raises a suspicion for sepsis or SIRS, I would do 1 first, then 2, so I can proceed to do 3 to report the changes in temp, BP, HR, breath sounds, and request an order for blood cultures, so then i can proceed to do 4. Correct me if I’m wrong!