What is the correct chest compression depth for a child?
a) At least 1/4 the depth of the chest, or about 1"
b) At least 1/3 the depth of the chest, or about 1 1/2"
c) At least 1/3 the depth of the chest, or about 2"
d) At least 1/2 the depth of the chest, or about 3"