Theinformationinthefirstparagrap

问题：

根据以下材料，回答下面的题目。
TheFamiIv
Thestructureofafamilytakesdifferentformsaroundtheworldandeveninthesamesociety.Thefamily’Sformchangesasitadaptstochangingsocialandeconomicinfluences.Untilrecently.themostcommonforminNorthAmericawasthenuclearfamily，consistingofamarriedcouplewiththeirminorchildren.Thenuclearfamilyisanindependentunit.Itmustbepreparedtofendforitself.Individualfamilymembersstronglydependononeanother.Thereislittlehelpfromoutsidethefamilyinemergencies.Elderlyrelativesofanuclearfamilyarecaredforonlyifitispossibleforthefamilytodoso.InNorthAmerica，theelderlyoftendonotlivewiththefamily;thevliveinretirementcommunitiesandnursinghomes.
Therearemanyparallelsbetweenthenuclearfamilyinindustrialsocieties.suchasNorthAmerica，andoffamiliesinsocietiessuchasthatoftheInuits，wholiveinharshenvironments.Thenuclearfamilystructureiswelladaptedtoalifeofmobility.Inharshconditions，mobilityallowsthefamilytohuntforfood.ForNorthAmericans，thehuntforjobsandimprovedsocialstatusalsorequiresmobility.
ThenuclearfamilywasnotalwaystheNorthAmericanstandard.Inamoreagrariantime，themallnuclearfamilywasusuallypartofalargerextengedfamily.Thismighthaveincludedgrandparents，motherandfather，brothersandsisters，uncles，aunts，andcousins.InNorthAmericatoday，thereisadramaticriseinthenumberofsingle.parenthouseholds.TwiceasmanyhouseholdsintheUnitedStatesareheadedbydivorced，separated，ornever。marriedindividualsasarecomprisedofnuclearfamilies.Thestructureofthefamily，notjustinNorthAmerica，butthroughouttheworld，continuestochangeasitadaptstochangingconditions.
Anothergoodtitleforthispassagewouldbe

A.listingstatistics
B.tellingastory
C.pointingoutsimilarities
D.pointingoutdifferences

参考答案：C

参考解析：

C题干意为“第一段主要以何种方式陈述的?”根据第一段的陈述方式，并没有列出数据或者讲故事，而是通过描述共性而阐述出核心家庭的概念。因此C“指出相似性”是正确的答案。