Which statements are true regarding single row functions?

Which statements are true regarding single row functions? (Choose all that apply.)

A.
TRIM : can be used to remove all the occurrences of a character from a string

B.
INSTR : can be used to find only the first occurrence of a character in a string

C.
SYSDATE : returns the database server current date and time

D.
MOD : returns the quotient of a division

E.
CONCAT : can be used to combine any number of values

F.
TRUNC : can be used with NUMBER and DATE values

Explanation: