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. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].

Rio Ferdinand believes Louis van Gaal's decision to return Wayne Rooney to his favoured attacking role has led to the Manchester United's upturn in performance levels. Writing in his column in The Sun ahead of the Manchester derby on Sunday, Ferdinand, now at Queens Park Rangers, revealed his belief that Rooney playing as a striker is fundamental to United hitting fifth gear. He praised Van Gaal for moving his captain further up the field after a spell in the centre of the pitch at the start of the year but admitted the return to form and fitness of Ander Herrera, Marouane Fellaini and Michael Carrick has also been important.Rio Ferdinand says Manchester United need Wayne Rooney in attackHe believes Rooney's form has been key to their upturn in performancesFerdinand said United's 2-1 win at Anfield shows they are 'on to something'Manchester United vs Manchester United: The expert view of the derbyCLICK HERE for all the latest Manchester United news 
 Question:Ferdinand also pointed to the return of midfield player Michael Carrick (left) as a help to _.
Manchester United

Police in Oakland, California, say they have found no evidence to link murder suspect Robert Durst to the 1997 disappearance of Charlotte teenager Kristen Modafferi. Durst, the subject of HBO's documentary series The Jinx, was arrested last weekend and was charged on Monday by L.A. officials in connection with the 2000 murder of his friend Susan Berman. In the wake of Durst's arrest, Oakland police revealed that they and the FBI were looking into the possiblility that he was somehow involved in Modafferi's disappearance. Scroll down for video Police in Oakland, California, say they have found no evidence to link murder suspect Robert Durst to the 1997 disappearance of Charlotte teenager Kristen ModafferiPolice in California say they have found no evidence to link murder suspect Robert Durst to the 1997 disappearance of Kristen ModafferiDurst was rumored to be living in the area at the time of Modafferi's disappearancePolice in Eureka, California, do however remain interested in Durst in connection with the disappearance of Karen Mitchell the same yearDurst was arrested last weekend and was charged on Monday in connection with the 2000 murder of his friend Susan Berman 
 Question:At this time we do not have any evidence that indicates _ was involved in her disappearance.'
Robert Durst

(CNN) US President Donald Trump and his Chinese counterpart Xi Jinping spoke by phone Thursday evening, the first conversation between the two since Trump took office. In the call, the two leaders discussed "numerous topics," and Trump committed to honoring the "One China" policy at Xi's request, the White House said. Since his election in November, President Trump has challenged Beijing over several issues and, most controversially, upended decades of diplomatic protocol by questioning longstanding American policy towards Taiwan. China views Taiwan as a breakaway province and, since 1979, the US has acknowledged Beijing's claim that Taiwan is part of China, with US-China relations governed by the set of protocols known as the "One China" policy.Trump threw China relations into doubt after phone call with Taiwanese presidentTaiwan says it will maintain close contact with USUS-China relations have long been governed by "One China" policy 
 Question:In response to the call, _'s presidential office said it would "maintain close contact and communication" with the US.

Taiwan