Enigma was:

A.
The German rotor machine used in WWII.

B.
Probably the first programmable digital computer.

C.
An English project created to break German ciphers.

D.
The Japanese rotor machine used in WWII.

Explanation:
Answer “An English project created to break German ciphers” describes the Ultra Project based in
Bletchley Park , England.
Answer “The Japanese rotor machine used in WWII” describes the Japanese Purple Machine.
Answer “Probably the first programmable digital computer” refers to Collossus.