Evaluate the following command：   SQL>ALTER SYSTEM SET db_securefile = ’IGNORE’；   What is the impact of this setting on the usage of SecureFiles？（）

• A、 It forces BasicFiles to be created even if the SECUREFILE option is specified to create the LOB
• B、 It forces SecureFiles to be created even if the BASICFILE option is specified to create the LOB
• C、 It does not allow the creation of SecureFiles and generates an error if the SECUREFILE option is specified to create the LOB
• D、 It ignores the SECUREFILE option only if a Manual Segment Space Management tablespace is used and creates a BasicFile