This one is a little tricky. The problem states that Kallie already has a fantastic technique and energy out put, so intensity and frequency are out of the game. (Ha! See what I did there? XD) Time and Type are both good options. I’m not entirely sure about this one but I know it’s either time or type.
Sorry I couldn’t get my answer to be more specific but I hope I helped at least a little! If you need anything else please feel free to ask!
