CREATE TABLE table_name_90 (mountain_range VARCHAR, region VARCHAR, mountain_peak VARCHAR)

what is the mountain range when the region is british columbia and mountain pea is mount edziza?
SELECT mountain_range FROM table_name_90 WHERE region = "british columbia" AND mountain_peak = "mount edziza"
SELECT "mountain_range" FROM "table_name_90" WHERE "british columbia" = "region" AND "mount edziza" = "mountain_peak"