Which edit tool is recommended to update this feature class?

An ArcGIS user needs to update a coastline feature class after a recent weather event. The user receives aerial imagery taken 1 week after the event. All features will NOT need to be updated, but some areas have experienced soil loss due to erosion. Rather than redigitizing the entire coastline, the user wants to update the existing coastline feature class based on the new aerial imagery.

Which edit tool is recommended to update this feature class?
A . Copy Parallel
B . Trace Feature
C . Reshape Feature
D . Trim Line

Answer: B

Explanation:

Reference: http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=An_overview_of_editing_and_data_compilation