Select the option that expresses the given sentence in active voice.
The lock had been opened using a hairpin and the lights were switched on.
1
A hairpin had been used to opened the lock and the lights were switched on
2
Someone had opened the lock using a hairpin and switched on the lights.
3
A hairpin was opened to use the lock and switched on the lights.
4
Someone was opening the lock using a hairpin and the lights were switched on.