What is a serious deficiency of hunting with a knife?

• dangerous
  When using a knife to hunt, the hunter must get up close and personal with the prey -- which is quite dangerous.
• must get close to prey
  When using a knife to hunt, the hunter must get up close and personal with the prey -- which is quite dangerous.
• both answers
  When using a knife to hunt, the hunter must get up close and personal with the prey -- which is quite dangerous.