Consider a relation

R

$($

A

$,$

B

$,$

C

$,$

D

$,$

E

$)$

R$($A$,$B$,$C$,$D$,$E$).$

You are told that

A

$+$

$=$

$\{$

A

$,$

D

$\}$

A

$+$

$=\{$A$,$D$\},$

B

$+$

$=$

$\{$

B

$,$

C

$,$

D

$\}$

B

$+$

$=\{$B$,$C$,$D$\}$ and

C

$+$

$=$

$\{$

C

$,$

D

$\}$

C

$+$

$=\{$C$,$D$\}.$

In addition, the following FDs are a subset of the FDs that hold in

R

R$,$

F

$=$

$\{$

A

C

$->$

E

$,$

A

C

D

$->$

B

$,$

A

B

C

$->$

D

E

$,$

B

E

$->$

A

D

$\}$

F$=\{$AC$->$E$,$ACD$->$B$,$ABC$->$DE$,$BE$->$AD$\}.$

Which of the following is a superkey of

R

R$?$