Which SQL statement would create a valid INCLUDE index?

Question $21$Select one:

A$.$

CREATE INDEX IXC

ON TESTTAB$($COL$5)$ CLUSTER

INCLUDE $($COL$6)$;

B$.$

CREATE UNIQUE INDEX IXA

ON TESTTAB$($COL$1)$

INCLUDE $($COL$2)$;

C$.$

CREATE INDEX IXB

ON TESTTAB $($COL$3+$COL$4)$

INCLUDE $($COL$5)$;

D$.$

CREATE INDEX IXD

ON TESTTAB$($COL$7)$ NOT PADDED

INCLUDE $($COL$8)$;