Which of the following is false about indexes?
A.
Index files are auxiliary files used to speed up searching of a data file
B.
Spatial indexes represent extended spatial data by minimum orthogonal bounding rectangles
C.
B-tree is a popular method for indexing spatial data
D.
A space-filling curve improves performance of B-tree on spatial data
E.
Some spatial objects are so large that they may have their own internal indices