Based on the news about the stock in the past five trading days, please predict the rise or fall of the stock in the next trading day. If the stock is predicted to rise in the next trading day, please output [Rise], if the stock is predicted to fall in the next trading day, please output [Decrease].

Date:2019-12-09, Stock:RIO, The news for the past five days is as follows:
2019-12-02: nan
2019-12-03: NEWS1: U.S. copper frenzy grows as Rio Tinto plans $1.5 bln Utah mine expansion.
2019-12-04: NEWS1: Buying Iron Ore Is Getting More Like Shopping on Amazon.NEWS2: 10 Bargain Blue Chips with Improving Growth Prospects.NEWS3: Violent Protests Shut Down Key Rio Tinto Mine in South Africa.NEWS4: Rio Tinto halts work at South African mine over escalating violence.
2019-12-05: NEWS1: Apple Buys First Carbon-Free Aluminum from Rio-Alcoa Venture.NEWS2: Apple Buys First Carbon-Free Aluminum from Rio-Alcoa Venture.NEWS3: Apple buys first-ever carbon-free aluminum from Alcoa-Rio Tinto venture.NEWS4: Alcoa's Australian smelter needs cheaper power to stay open past 2021 - partner.
2019-12-06: NEWS1: Bougainville island faces copper ‘curse’ amid independence vote.NEWS2: Bougainville independence vote raises spectre of ‘resource curse’.

Answer: Rise