How can you define a field so that when entering data for that field it will display ****** instead of actual typed text

How can you define a field so that when entering data for that field i

1.	How can you define a field so that when entering data for that field it will display ****** instead of actual typed text
A.	Input mask
B.	Validation Rule
C.	Indexed
D.	IME Mode
Answer» B. Validation Rule