Which two statements are true about date/time functions in a session where NLS_DATE_FORMAT is set to

Which two statements are true about date/time functions in a session where NLS_DATE_FORMAT is set to DD-MON-YYYY HH24:MI:SS? (Choose two.)

A. CURRENT_TIMESTAMP returns the same date and time as SYSDATE with additional details of fractional seconds

B. SYSDATE and CURRENT_DATE return the current date and time set for the operating system of the database server

C. CURRENT_DATE returns the current date and time as per the session time zone

D. CURRENT_TIMESTAMP returns the same date as CURRENT_DATE

E. SYSDATE can be queried only from the DUAL table

F. SYSDATE can be used in expressions only if the default date format is DD-MON-RR

Correct Answer: C,E