Given the task definition and input, reply with output. In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.

Lewis Hamilton has paid tribute to his team-mate Nico Rosberg after Mercedes celebrated successive team championships on Monday. Both Hamilton, who has one hand on a third Formula One title after his victory in Russia, and Rosberg flew in to the team's headquarters in Brackley and Brixworth to toast Mercedes' constructors' triumph with their 1,100-strong staff. But for Rosberg, the celebrations would have been bittersweet after he retired from Sunday's race at Sochi's Olympic Park with a mechanical issue. The German will now be eliminated from this year's championship battle if Hamilton outscores him by a mere two points at the next race in Austin in a fortnight's time.Mercedes were crowned constructors' champions following Russian GPLewis Hamilton won in Sochi and is closing in on his third drivers' titleThe Briton paid tribute to his team-mate Nico Rosberg during celebrations 
 Questions:He is 66 points ahead of Sebastian Vettel and 73 points clear of _ with only four races remaining. (A) Lewis Hamilton (B) Nico Rosberg (C) Mercedes (D) Hamilton (E) Formula One (F) Russia (G) Brackley (H) Brixworth (I) Sochi (J) Olympic Park (K) German (L) Austin (M) Russian (N) Briton

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
(B)