Select the correct active form of the given sentence.
Mobile toilets were placed by the district administration behind the area where people assembled for army recruitment.
1
The district administration has placed mobile toilets behind the area where people assembled for army recruitment.
2
The district administration placed mobile toilets behind the area where people assembled for army recruitment.
3
The district administration is planning to place mobile toilets behind the area where people will assemble for army recruitment.
4
The mobile toilets placed district administration behind the area where people assembled for army recruitment.