Explanation of -c

[Badders]

Hi,

c[0,1,2,10,11,13,15,17,19,l,p,w,b,d,z] : set compression level
                  (0 - store; 1 - normal ; 2 - maximal)
                  (10 - store, 11 - super fast, 13 - fast, 15 - normal, 17 - max, 19 - ultra
                  (l - use LZMA, p - use PPMd, w - use WavPack, b - use BZIP2, d - use Deflate
                  (z - use optimized compression method based on file exstension)

Can you confirm whether these are cumulative or whether you can only have one option?

For example: Can I have 2-maximal compression using d-Deflate? If so would the format be "-c2,d"?

Thanks.