题目内容：
Questionsarebasedonthefollowingpassage:
Englandisnotabigcountry:fromnorthtosouthandfromeasttowestitisonlyaboutthreehundredmilesacross．Butforasmallcountryithasasurprisingrangeofclimate．PeoplewhohavenevervisitedEngland,orwhohavevisitedonlyonepartofit,oftenmakethemistakeofthinkingthatitisacoldandwetcountry,ExceptforthesummermonthsofJunetoSeptember,thisisprobablytrueofthenorthofEnglandandtheMidlands．Inthesouth,however,theclimateismuchmorepleasant．Oneresultisthatwhenpeopleretirefromajobinthenorththeyoftenprefertomovedowntothemildersouth．
Perhapsthewarmestpartofthecountryisthesouthwest,whichconsistsofthecountiesofDevonandCornwall．ThewarmGulfStreamflowsacrosstheNorthAtlanticOceanfromtheGulfofMexicoandmakesthecoastalregionsofthesouthwestquitewarm．Palmtrees,bamboo(竹)andmanysemi-tropical(亚热带的)plantsgrowwellinthesouthwestofEngland．Flowersandvegetablesripen(成熟)asmuchasamonthearlierthanthoseelsewhere．Farmersintheareaobtainahigherpricefortheirvegetablesandflowersbecausetheyarereadearlier．InwintertheremaybeseveralfeetofsnowinotherpartsofEnglandbuttherewillprobablybenosnowatallinthesouthwest．ThismaybeoneofthereasonswhythesouthwestisoneofEngland'smostpopularholidayareas．
ThedistancefromthecenterofEnglandtothesouthcoastisabout（ ）． A．onehundredmiles
B．threehundredmiles
C．onehundredandfiftymiles
D．sixhundredmiles
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答案解析：