Which of the following best describes a unit of work?
A.
It is a recoverable sequence of operations whose point of consistency is established when a
connection to a database has been established or when a mechanism known as asavepoint is
created.
B.
It is a recoverable sequence of operations whose current point of consistency can be
determined by querying the system catalog tables.
C.
It is a recoverable sequence of operations whose point of consistency is established when an
executable SQL statement is processed after a connection to a database has been established or
a previous transaction has been terminated.
D.
It is a recoverable sequence of operations whose point of consistency is only established if a
mechanism known as asavepoint is created.