In the context of file deletion process, which of the following statement holds true?

In the context of file deletion process, which of the following statement holds true?
A . When files are deleted, the data is overwritten and the cluster marked as available
B . The longer a disk is in use, the less likely it is that deleted files will be overwritten
C . While booting, the machine may create temporary files that can delete evidence
D . Secure delete programs work by completely overwriting the file in one go

Answer: C