You are developing an ASP.NET MVC application that reads and writes data from a SQL Server database.
You need to maintain data integrity in all situations that use transactions.
A.
ReadUncommitted
B.
Repeatable
C.
Serializable
D.
ReadCommitted
Explanation:
The highest isolation level, serializable, guarantees that a transaction will retrieve exactly the same data every
time it repeats a read operation.
https://technet.microsoft.com/en-us/library/ms189122(v=sql.105)