Select the phrase/connector from the given three options which can be used to form a single sentence from the two sentences given below, implying the same as expressed in the statement sentences.
N95 is not required and people can stay comfortable and protected. This is possible only when everyone is wearing a mask.
1. If people can stay comfortable
2. If everyone is wearing a mask
3. If N95 is not required
1
Only 1
2
Only 2
3
Only 3
4
Both 1 and 2
5
Both 2 and 3