this was the best way I could think of people entering the dangerous areas of the parkA stopping B to keep C to stop D keeping

this was the best way I could think of people entering the dangerous areas of the parkA stopping B to keep C to stop D keeping
this was the best way I could think of people entering the dangerous areas of the park
A stopping B to keep C to stop D keeping

this was the best way I could think of people entering the dangerous areas of the parkA stopping B to keep C to stop D keeping
A
首先可以排除B,D.因句子意思是阻止人们进入公园的危险区域,所以B,D不符合
think of后接ING形式

C

我想这是人们进入公园危险地带最好的一条路