What Is the Benefit of Using "Fast and Frugal Heuristics

What is the benefit of using "fast and frugal heuristics"

A)  We tend to have greater confidence in decisions made that way. 
B)  We make more accurate decisions than when we use careful reasoning. 
C)  There are few benefits to the use of those heuristics, as decision making tends to be very flawed when done rapidly. 
D)  We can make decisions very quickly.