Which two parameters should the user consider changing in the IDW tool?

Using the Spatial Analyst IDW (Inverse Distance Weighted) tool an ArcGlS user interpolates a point feature class to a raster. The user notices that some high point values near the edge of the feature class seem to have a dramatic effect on the output.

This occurs even in areas that are far from the high edge values

Which two parameters should the user consider changing in the IDW tool? (Choose two)
A . z-value field
B . search radius
C . power
D . output cell size
E . weight

Answer: D,E