By which method? (3)
I believe the answer is:
how
(Other definitions for how that I've seen before include "In what way?" , "See 16" , "In what manner or method?" , "By what means?" , "Who (anag.)" .)
I believe the answer is:
how
(Other definitions for how that I've seen before include "In what way?" , "See 16" , "In what manner or method?" , "By what means?" , "Who (anag.)" .)