The principle of Good Samaritan laws provides for

Think of Good Samaritan laws as laws meant to encourage someone to help in an emergency without being overly afraid of being sued afterward . In EMS education, the key legal idea is that these laws generally aim to limit civil liability for people who voluntarily provide emergency aid in good faith. That matches “decreasing the chance of civil liability.” ( NCBI )

This is why C is the best NREMT-style answer. The protection is not absolute, and it does not mean a person can act recklessly, but the main principle is reducing fear of civil lawsuits so emergency assistance is more likely to be given. ( NCBI )