Shimoliy Amerikada qor boronidan song normal qanotli chumchuqlarning y

A) a - harakatlantiruvchi tanlanish, b - harakatlantiruvchi tanlanish ’
B) a - stabillashtiruvchi tanlanish, b - stabillashtiruvchi tanlanish
C) a - harakatlantiruvchi tanlanish, b - stabillashtiruvchi tanlanish
D) a - stabillashtiruvchi tanlanish, b - harakatlantiruvchi tanlanish