单选题

An online tablespace, TEST_TBS, is full and you realize that no server-managed tablespace threshold alerts were generated for the TEST_TBS tablespace. What could be the reason, if the TEST_TBS tablespace does not include autoextensible data files?（）

ATEST_TBS is a small file tablespace

BTEST_TBS is a bigfile tablespace (BFT)

CTEST_TBS is the default temporary tablespace

DTEST_TBS is a dictionary-managed tablespace

EThreshold values for the TEST_TBS tablespace are not explicitly specified

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