题目内容：
根据下面内容，回答题
Disney'scartoon,FindingNemo,tellsatouchingstoryofafathercalledMartinandhissonNemo.
Martinloseshiswifeandanentirefamilyofunhatchedeggstoahugeshark．Onlyonefisheggremains,Nemo．Martinpromiseshisdeadwifethathewillprotecthisyoungsonatanycost.So,Martinbecomesfearfulofalmosteverythingintheocean．Thatmakeshimoverprotective--hehopestokeephiskidsafefromthechallengesthatlifepresents．Martin'snagging(唠叨)makesNemofeelthathedoesn'tneedhisdadtellinghimwhattodo.
Soonhisfirstdayofschool,Nemoandsomefriendsswimtotheedgeoftheircoralreef,aplaceMartinalwaysthinksisverydangerous．WhenMartinshoutsatNemocomeback,Nemorefusestolistentohimandswimouttoaboatinthedistance．Suddenly,hegetscaughtbysomedivers．SobeginsMartin'sjourneytofindNemo,whoendsupinanaquariuminanofficeinAustralia．SoontheworriedfatherrunsintoDory,aforgetfulbluefish,whohelpsMartinfindhisson．Meanwhile,Nemomisseshisfatherterribly．Hesoonhearsthathewillbegiventoaneight-year-oldgirlwholikestokillfish.
CanMartinfindhissonbeforeitistoolate?
FindingNemoisaphysicalandmentaljourney．MartinovercomeshisshynessandanxietiesandNemodiscovershisownandhisfather'shiddenstrengths．Itcelebratestherelationshipbetweenfathersandtheirsons.
Thecartoonpaintsaseaworldthatisalivewithcolor．Allthecharactersareveryhuman-like
andhavetheirownpersonalities.
FindingNemowasreleasedintheUSonmay30,earningaboutUS$70.6millioninjust
threedays,ithassetanewopeningrecordsforacartoon.
Whatisthepassagemainlyabout? A．Howafatherfindshisson
B．Howtogethomewhengettinglost
C．Abriefintroductiontoacartoonfilm
D．Thelovebetweenafatherandhisson
参考答案：【答案仅供学习，请勿对照自行用药等】
答案解析：