阅读理解。阅读下列短文,从给的四个选项(A、B、C和D)中,选出最佳选项。ThePacificOceanisthelargestoftheworld’sfouroceans.ItsnamecomesfromtheLatinmeaning“peacefulsea”，andwasgivenbythePortugueseexplorerFerdinandMagellan,whosevoyagewasplainthere.However,thePacificisnotalwayspeaceful.Itsislandsareoftenhitbytyphoons,andthecountriessurroundingithavemanyvolcanoesandareoftenhitbyearthquakes.Tsunamis(海啸),causedbyunderwaterearthquakes,havedestroyedmanylow－lyingcoastaltowns.TheOceancontainsabout46%ofEarth’ssurfacewater,andmakesupabout32%ofitstotalsurfacearea,morethanalloftheplanet’slandareas.Theequator(赤道)dividesitintotheNorthPacificandtheSouthPacificOceans,thelatterofwhichcontainsmostofitslargest25,000islands.ThelargestlandmassentirelywithinthePacificOceanistheislandofNewGuinea,withAustraliatoitssouth；ithasbeentheworld’ssecond－largestislandsinceseparatingfromtheAustralianmainland.ThelowestpointonEarth,theMarianaTrench(海沟),lies10,911metersbelowthesurfaceofthePacific,buttheOcean’saveragedepthis4,280meters.ThewatertemperatureofthePacificvariesfromfreezingatthepolestoabout300Cneartheequator.Itssalinity(盐分)alsovariesfromplacetoplace.Thewaterneartheequatorislesssaltybecauseoftherainfallthere,butatthepolessalinityisalsolow,becauselittleevaporation(蒸发)takesplaceinthecoldwateroftheseareas.Theexploitation(开采)ofthePacific’smineralwealthisdifficultinitsdeeperparts.However,intheshallowwatersofthecontinentalshelvesoffthecoastsofAustraliaandNewZealand,oilandnaturalgasareexploited,andpearlsareharvestedalongthecoastsofAustralia,Japan,NicaraguaandthePhilippines.ThePacific’sgreatestwealthisitsfish,butthefishingindustryhasbeenharmedgreatlybymarinepollution.ThebiggestharmcomesfromriversthatcarryintotheOceanmanychemicalsusedasfertilizersinagriculture,aswellaswaste.ThesedaysmanycountriesarecomingtogethertotrytoprotecttheOcean.1.FerdinandMagellangavetheOceanitsnamebecausehe________.A.expectedtoliveapeacefullifeB．hopedtherewouldbenomorewarsC．cameuponnoseriousstormswhilecrossingitD．expectedtostaysafeandhealthythere2.Fromthe