In ArcMap, how can a user project a layer without using a geoprocessing tool?

In ArcMap, how can a user project a layer without using a geoprocessing tool?
A . Right-click a file geodatabase > Import feature class (multiple)
B . Set the coordinate system of the data frame > Export Data with the coordinate system of the source data
C . Right-click a feature dataset with the correct coordinate system > Import feature class (Single)
D . Set the coordinate system of the data frame > Export Data with the coordinate system of the data frame

View Answer

Answer: C