How to improve upon the ENC$-$PDP scheme?

Question $11$Select one:

a$.$

one goal is to create t unique and identifiable replicas suitable for use in PDP based on preprocessing the input file "a single time."

b$.$

constant amount of metadata for any number of replicas, and new replicas may be created dynamically without preprocessing the file again.

c$.$

he encrypted file

d$.$

F~ to also generate t different file replicas, where each replica F u