C.
The information required for the calculations is very easily obtained, making this an advantage of the method.
<span>A rain gauge is an instument used to measure the amount of liquid precipitation over a certain length of time. In its simplest sense, a rain gauge is nothing more than a can which collects water which falls from the sky as rain. The depth of the rain can be measured with a ruler.</span>
I am pretty positive that it's A. That was 95% a guess though.
the answer is clearly b) losing a loved one in an accident