The perinatal nurse observes a woman entering the transition phase of labor while she uses a ...

The perinatal nurse observes a woman entering the transition phase of labor while she uses a patterned breathing method to cope with the increasing strength of contractions.
 
  She complains of light-headedness and tingling in her fingers. The most appropriate intervention by the nurse is to assist the patient in doing which of the following?
  A.
  Breathing more slowly and taking a cleansing breath
  B.
  Cupping her hands and breathing into them
  C.
  Putting her head between her knees
  D.
  Returning to bed and lying on her left side