Select the Meaning of the Underlined Word in the Sentence

Select the meaning of the underlined word in the sentence.
The use of advanced triage may become necessary when medical professionals decide that the medical resources available are not sufficient to treat all the people who need help.

A) medical process where patients are sorted according to their need for care
B) a waiting list
C) a strip of cloth used to bind or cover an injured part of the body
D) a branch of medicine that solves health problems by operating on the body