Which of the following pieces of equipment is acceptable for use in the prehospital stabilization of suspected cervical spine injuries?
a. 2 double prime′′ times ×4 double prime′′ wood cribbing
b. soft cervical collars
c. five-pound sand bags
d. rigid cervical collars

Which of the following statements concerning cancer and mutations is correct? a: cancer can only occur with a mutation in a somatic cell. b: usually, multiple mutations are required in different genes to cause cancer. c: none of the other answer options is correct. d: cancer can only occur with a mutation in a germ cell. e: usually, a single mutation is all that is required to cause cancer.