Which constraints will remain enabled by default during this operation?

You plan to move data from a flat file to a table in your database. You decide to use SQL*Loader direct path load method to perform this task. The table in which you plan to load data in an important table having various integrity constraint defined on it.
Which constraints will remain enabled by default during this operation? (Choose all that apply.)

A.
NOT NULL

B.
FOREIGN KEY

C.
UNIQUE

D.
CHECK

E.
PRIMARY KEY