题目内容：
阅读文章，回答题：AHoney(蜂蜜)fromtheAfricanforestisnotonlyakindofnaturalsugar,itisalsodelicious．Mostpeople,andmanyanimals,likeeatingit．However,theonlywayforthemtogetthathoneyistofindawildbees'nest(巢)andtakethehoneyfromit．Often,thesenestsarehighupintrees,anditisdifficulttofindthem．InpartsofAfrica,though,peopleandanimalsunexpectedhelper一alittlebirdcalledahoneyguide.
bluehoneyguidedoesnotactuallylikehoney,butitdoeslikethewax(蜂蜡)inthebeehives(蜂) finallyarriveatthenest,thefollowerreachesintogetatthedelicioushoneyasthebirdpatientlywaitsandwatches．Someofthehoney,andthewax,alwaysfallstotheground,andthisiswhenthehoneyguidetakesitsshare.
Scientistsdonotknowwhythehoneyguidelikeseatingthewax,butitisverydeterminedinitseffortstogetit．Thebirdsseemtobeabletosmellwaxfromalongdistanceaway．Theywillquicklyarrivewheneverabeekeeperistakinghoneyfromhisbeehives,andwillevenenterchurcheswhenbeeswaxcandlesarebeinglit.
Whyisitdifficulttofindawildbees'nest? A．It'ssmallinsiz
B．It'shiddenintree
C．It'scoveredwithwa
D．It'shardtorecogniz
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