Karnaugh map simplification I'm working through an example that looks like a fairly simple Karnaugh map and simplification, but I feel stupid that I can't seem to understand the correct answer.

This is the map:


My groupings:


This is the equation:


But I don't know how it simplifies to the correct answer here:


I understand why the NOT A goes outside of the bracket, but I don't see how the C OR NOT C just becomes a C inside the bracket?
Check for solution. Grouping should be done using 2 quads