Select the phrase/connector from the three options that can be used to form a single sentence from the two sentences below, implying the same as expressed in the statement sentence.
They are not my family. I can not be held responsible for their immature behaviour.
1. Therefore
2. And
3. Because
1
Only 1
2
Only 2
3
Only 3
4
Both 1 and 2
5
Both 1 and 3