Answer:
c. find / -user tprice
Step-by-step explanation:
The command used to search for files is called find. 
When you search by user across the whole drive, use the following syntax:
find / -user filename
-  The first part of the find command is the find command itself.
-  The next part is an expression which determines what to find. (-user)
-  Finally the last part is the name of the thing to find. (tprice)