Final answer:
The techniques to be used when you are the only one giving CPR to a child include performing chest compressions, giving rescue breaths using a barrier device, and continuing CPR until medical help arrives or the child starts breathing on their own.
Step-by-step explanation:
The techniques to be used when you are the only one giving CPR to a child include:
- Perform chest compressions at a rate of 100-120 compressions per minute.
- Give rescue breaths using a barrier device.
- Continue CPR until medical help arrives or the child starts breathing on their own.
Therefore, the correct answer is option 4) All of the above.