Several SQL Operations Are Performed by User 1 to Access

Multiple Choice

Several SQL operations are performed by User 1 to access the Fee information for Bowling in the Act_Fee relation (shown in the exhibit) . The first access returns a fee of 50. An unrelated SQL operation by another user updates the Bowling fee to 60. The second access by User 1 returns a fee of 60. What problem has occurred?

A) Rollback
B) Deadlock
C) Dirty read
D) No problem has occurred.