Protect the middle of three double ataris

Double Atari points  

Dieter: Lately having done hundreds of tsumego I discovered a heuristic for problems involving several double ataris threatening a group. The solution is - obviously - very often to protect the middle of three double atari spots.

In the diagram on the left, white can double atari at any of the points marked d. The middle of the three is the best spot to protect.

Example

Answer?  

Crimson : is an answer...

Double Atari points  

Protect the middle one and white has no attack:

Common in beginner games  

Confused: Do you mean situations like this?

Dieter: No: see later added example above. Maybe remove this double hane issue elsewhere.