单选题Wherever you are in the U. S., the most important factor in surviving cardiac arrest is ______.A to keep tracking outcomes of the cases.B to have very well-organized EMS system.C to make people well-informed before an emergency.D to have rapid treatmen

题目
单选题
Wherever you are in the U. S., the most important factor in surviving cardiac arrest is ______.
A

to keep tracking outcomes of the cases.

B

to have very well-organized EMS system.

C

to make people well-informed before an emergency.

D

to have rapid treatment with as little delay as possible.

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