Answer: E
Routine use of cricoid pressure is not recommended in cardiac arrest.
“Cricoid pressure can prevent gastric inflation and reduce the risk of regurgitation and aspiration during bag-mask ventilation, but it may also impede ventilation. Seven randomized studies showed that cricoid pressure can delay or prevent the placement of an advanced airway and some aspiration can still occur despite application of cricoid pressure. In addition, it is difficult to appropriately train rescuers in use of the maneuver.”
Reference
2010 AHA Guidelines for CPR & ECC (Link)