سوال ۱۴ کنکور ارشد مدیریت کسب‌وکار (MBA) ۱۴۰۲

Choose the marked part that must be changed for the sentence to be correct. The four marked parts are listed as the options.

(1) To be started around 8000 B.C.E., the most extensive exploitation of agriculture occurred in river valleys, (2) where there were both good soil and a dependable water (3) supply regardless (4) of the amount of rainfall.