Your company CEO just sent you an E-mail asking you to make a … on your project , which has been in progress for 10 months , to all Identified internal and external stakeholders. He scheduled the presentation for next Monday.You expect more than 50 people to attend. The first step in preparing the presentation is to ( ).

A、B、C、D、E、F、G代表七個(gè)村落，村落之間的道路連通情況如下圖所示（邊上的數(shù)據(jù)為距離，單位為公里）。這七個(gè)村落擬合建一所小學(xué)，已知A村有小學(xué)生50人、B村有小學(xué)生40人、C村有小學(xué)生60人、D村有小學(xué)生20人、E村有小學(xué)生70人、F村有小學(xué)生80、G村有小學(xué)生100人。則擬合建小學(xué)應(yīng)建在（）村落，才能使學(xué)生上學(xué)所走的總路程最短。