Thomas Is a Network Expert, Having Mastered the Finer Points

Thomas is a network expert, having mastered the finer points of network structure, topology, and geographical scope. He has built many different types of networks at home, school, and work. He is now designing a home network for his friend.
-Thomas's friend has a particular folder into which he wants to allow people to put files without allowing them to open,copy,or change any files in that folder.What kind of permission should Thomas assign to this folder?

A) Read only
B) Read and write
C) Homegroup
D) Write only