CSWP Sheet Metal - help needed

Hi,

This is mostly to the ones who have passed the CSWPA-SM exam but not only.

I tried the test and I struggled with this problem. I have to make the red extension from the existing black part. A,B,C and D are given.

I tried many different features but none gave me the correct result. Which one did you choose?

Thanks in advance for your help.

SolidworksParts And Features