Final answer:
The appropriate steps to take if there is no response from the victim depend on the age of the victim. For a child or infant, give 1-2 minutes of CPR before calling 911. For an adult, call 911 immediately and then return to the victim.
Step-by-step explanation:
In the given scenario, if there is no response from the victim, the appropriate steps to take depend on the age of the victim. For a child, it is recommended to give 1-2 minutes of CPR before calling 911. For an infant, the same applies. However, if the victim is an adult, it is advised to call 911 immediately and then return to the victim. Therefore, the correct option in this case is d all the above.