USA is the country in which the metric system is not followed. Hence option A will be the correct answer.
All the other countries uses metric system for their units. Due to this season there is no confusion in conversion of the units. But England has special case, its distance is measured in miles and the speed is measured in miles per hour.
The other units are measured in metric uniform. Other than USA there are two more countries which do not accepts the metric unit system they are Liberia and Burma.
Science must be used to figure out the correct weight, length, and what material it is made out of to be the most successful at its job. Technology must be used to make sure that the calculations are correct and to use a 3d printer or something like that to make it, that or robots/tools.
Answer and explanation:
Following points should be kept in mind while doing or observing CPR.
1)Rate should be 100-120 compressions per minute.
2)Compression depth should be atleast 2 inches.
3)Push hard and fast.
4)Interruptions of almost 10 seconds
5)Give effective breaths to make the chest rise.
6)Ventilation.
B. I believe if not B. that it has to be D.