In Which of the Following Situations Would the Nurse Be

In which of the following situations would the nurse be most justified in implementing trial-and-error problem solving?

A) The nurse is attempting to landmark an obese client's apical pulse.
B) The nurse is attempting to determine the range of motion of a client's hip joint following hip surgery.
C) The nurse is attempting to determine which PRN (as needed) analgesic to offer a client who is in pain.
D) The nurse is attempting to determine whether a poststroke client has a swallowing deficit.