某施工单位通过投标，承揽了某建设单位的某施工项目的施工任务，由某监理单位对该工程实行工程监理。该工程基础类型为墙下钢筋混凝土条形基础，局部筏形基础，结构形式为现浇剪力墙结构，楼板釆用无粘结预应力混凝土。该施工单位缺乏预应力混凝土的施工经验，对该楼板无粘结预应力施工有难度，屋面防水采用SBS改性沥青防水卷材，外墙面喷涂，内墙面和顶棚刮腻子喷大白，屋面保温采用憎水珍珠岩，外墙保温采用聚苯保温板。

承包商对进场材料如何向监理报验？

A．Heavy rain triggered floods which caused heavy casualties and damage.

B．Harsh drought had been going on for several years and killed some people.

C．23 people were missing after a storm hit a village in the mountainous province.

D．Authorities were searching for the people who had crossed the border from other countries.