Which lock mode do you use if you want lock data can be edited only by one user and protects the locked objects against all types of other transactions?

Which lock mode do you use if you want lock data can be edited only by one user and protects the locked objects against all types of other transactions?
A . Read locks (lock mode Shored)
B . Optimistic locks (lock mode Optimistic)
C . Write locks (lock mode Exclusive)
D . Enhanced write locks (lock mode exclusive noncumulative)

Answer: C