The correct answer is: A. disadvantage of low high method.
The low-high method is a method of estimating the cost function of a process by considering only the two points with the lowest and highest costs. This method is simple to use, but it can be inaccurate because it ignores information from all other points.
The high-low method is a more accurate method of estimating the cost function. It considers all the data points and uses a linear regression model to estimate the cost function.
The advantage of the high-low method is that it is more accurate than the low-high method. The disadvantage of the high-low method is that it is more complex to use.
The advantage of the low-high method is that it is simple to use. The disadvantage of the low-high method is that it is less accurate than the high-low method.