Among the choices, letter A. trunk lift can be done with a partner. Trunk rotation and sit-and-reach can be done alone. When doing trunk lift, you can't measure alone on how far you have reached. Your in laying position where you are facing down. Your two hands are pressed under your legs.
Answer:
Physical surroundings.
Explanation:
Ruth wants to buy special gift for her best friend's baby shower party. She has invited her sister to help her out with the selection in the shopping. Situational influence is described but there is no hint of physical surrounding. Author has not mentioned anything about the physical surrounding in the passage.