Michael Moore, the human resource manager $at$ the $U.S.-$based Ultest International, $is$ developing $an$ international staffing policy for the company. Michael personally believes Ultest should send managers from the United States $to$ manage each subsidiary. But the CEO $of$ the company, Susan Jolie, believes subsidiary operations ought $tobe$ managed $by$ individuals from the host country.

The approach recommended $by$ Susan $is$ called ${?}_{(}{)}_{{?}_{?}}{?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{.}$

Group $of$ answer choices

polycentric staffing

ethnocentric staffing

vertical integration

horizontal integration