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?（）

• A、TEST_TBS is a small file tablespace 
• B、TEST_TBS is a bigfile tablespace (BFT)
• C、TEST_TBS is the default temporary tablespace
• D、TEST_TBS is a dictionary-managed tablespace
• E、Threshold values for the TEST_TBS tablespace are not explicitly specified