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.
(A) Siberia has been experiencing extreme heat due to a combination of persistent sunny weather and human-caused climate change.
(B) This has been continuing for months now.
1. experiencing extreme heat
2. for months now
3. combination of sunny weather and human-caused climate change
1
Only 1
2
Only 2
3
Only 3
4
Both 1 and 2
5
None of these