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.

[Q]: (CNN) Since the discovery of dark streaks on the slopes of Mars in 2011, astronomers have been excited about potential evidence of water beneath the surface of the red planet. If there are subsurface water flows on Mars, they could allow life -- even on a microbial level -- to exist as well. But further study of these recurring slope lineae, known as RSL, is revealing something else. Those dark streaks may be the result of granular flows like sand and dust, according to a study published Monday in the journal Nature Geoscience. The study is the product of a research team made up of representatives from the US Geological Survey, the Planetary Science Institute, the University of Arizona and Durham University in England.The flows correlate more with sand on active dunes rather than subsurface waterResearchers studied flows at 10 sites 
 Questions:Earth is the only analog we have for _, but Mars obviously behaves differently, the researchers said. (A) CNN (B) Mars (C) RSL (D) Nature Geoscience (E) US Geological Survey (F) Planetary Science Institute (G) University of Arizona (H) Durham University (I) England
[A]: (B)


[Q]: Just 90 miles away, Cuba inevitably shares a long history with the United States, from conquistadors to the Spanish-American War to the Cold War. Here are some of the top moments in that history, even before the countries came into being. Old World meets New World Christopher Columbus lands on Cuba in 1492 and claims the island for Spain, leading the way for that country's conquistadors to explore the Caribbean and the part of the U.S. Southeast that's now Florida, among other parts of the Americas. Spanish-American War The United States helps Cuba win independence from Spain in a war between the European country and the Americans in 1898. In one of the more famous moments, Theodore Roosevelt and his Rough Riders charge up Cuba's Kettle Hill during the Battle of Santiago, and the so-called 1st Volunteer Cavalry become instant heroes.The United States helped Cuba win independence from Spain in 1898The new Republic of Cuba allows the U.S. naval base in Guantanamo in 1903U.S. comes to brink of nuclear war with Cuba and Soviet Union in 1962A custody battle over Elian Gonzalez becomes an international incident in 1999 
 Questions:The U.S. occupation of Cuba lasts until 1902, during which _ forces modernize the capital's infrastructure. (A) Cuba (B) United States (C) Spanish-American War (D) Cold War (E) Old World (F) New World (G) Christopher Columbus (H) Spain (I) Caribbean (J) U.S. Southeast (K) Florida (L) Americas (M) European (N) Theodore Roosevelt (O) Rough Riders (P) Kettle Hill (Q) Battle of Santiago (R) Volunteer Cavalry (S) Republic of Cuba (T) Guantanamo (U) Soviet Union (V) Elian Gonzalez
[A]: (B)


[Q]: When David Ospina dropped Kostas Fortounis' corner into his own net, the fifth official was quick to make the correct call - showing how useful they can be. On the other hand, Chelsea were unlucky not to be awarded a penalty during the dying embers of the Champions League clash as Diego Costa flicked the ball up in an attempt to go past Ivan Marcano - only for the Spanish defender to stop the ball with his arm - which the fifth official missed. Here, Sportsmail's Graham Poll gives his views on the two major talking points and why he thinks video replays should be considered.Fifth official correctly spotted David Ospina drop Kostas Fortounis' corner into his own net - without the need for goal-line technologyMichel Platini prefers using the fifth official compared to technologyBut officials missed a blatant penalty during Chelsea's loss to PortoIvan Marcano handled a Diego Costa flick in the dying momentsREAD HERE: Arsenal suffer disappointing loss to OlympiacosREAD HERE: Jose Mourinho suffers defeat in return to Porto 
 Questions:The official awarded _ their second goal when Ospina spilled the ball from a corner and replays confirmed that the ball had crossed the line. (A) David Ospina (B) Kostas Fortounis (C) Chelsea (D) Champions League (E) Diego Costa (F) Ivan Marcano (G) Spanish (H) Sportsmail (I) Graham Poll (J) Michel Platini (K) Porto (L) Arsenal (M) Olympiacos (N) Jose Mourinho
[A]:
(M)