Retroviruses: reverse transcriptase and integrase

How does HIV, a retrovirus, insert its genome into the host's DNA?

1. AReverse transcriptase copies its RNA into DNA, and integrase inserts that DNA✕
2. BRNA-dependent RNA polymerase copies its genome into the host chromosome✕
3. CHost DNA polymerase copies the viral RNA into DNA✕
4. DTelomerase adds the viral genome to chromosome ends✕