Select the option that expresses the given sentence in active voice.
A selected group of activists had been invited by the minister before the announcement of the strike.
1
The minister was inviting a selected group of activists before the announcement of the strike
2
The minister had been inviting a selected group of activists before the announcement of the strike
3
The minister invited a selected group of activists before the announcement of the strike.
4
The minister had invited a selected group of activists before the announcement of the strike.