英语toefl tpo 14中的 一篇阅读的一道题不懂,

英语toefl tpo 14中的 一篇阅读的一道题不懂,
哪个选项是这个句子的统一改写?
Certainly,rational appeals in advertising aimed at children are limited,as most advertisements use emotional and indirect appeals to psychological states or associations.
选项是
8.Which of the sentences below best expresses the essential information in the highlighted sentence in the passage?Incorrect choices change the meaning in important ways or leave out essential information.
○Rational appeals in advertising are certainly limited by children's emotional immaturity and the indirect nature of their associations.
○Indirect appeals to children's psychological states or associations can limit the effectiveness of rational appeals in advertising.
○Rational appeals play a much smaller role in advertisements for children than emotional appeals and psychological associations do.
○Rational appeals in advertising aimed at children should certainly be limited until the children are emotionally and psychologically ready.
我主要是 2、3中间选不定,
答案好像是3
尤其是原句的意思,还有为什么2的意思不对?
该局所在段落是
Fantasy is one of the more common techniques in advertising that could possibly mislead a young audience.Child-oriented advertisements are more likely to include magic and fantasy than advertisements aimed at adults.In a content analysis of Canadian television,the author Stephen Kline observed that nearly all commercials for character toys featured fantasy play.Children have strong imaginations and the use of fantasy brings their ideas to life,but children may not be adept enough to realize that what they are viewing is unreal.Fantasy situations and settings are frequently used to attract children's attention,particularly in food advertising.Advertisements for breakfast cereals have,for many years,been found to be especially fond of fantasy techniques,with almost nine out of ten including such content.Generally,there is uncertainty as to whether very young children can distinguish between fantasy and reality in advertising.Certainly,rational appeals in advertising aimed at children are limited,as most advertisements use emotional and indirect appeals to psychological states or associations.

Certainly,rational appeals in advertising aimed at children are limited,as most advertisements use emotional and indirect appeals to psychological states or associations.
这句话的意思是rational appeals使用比较少,而 emotional and indirect appeals比较常用.所以作者是在比较rational appeals 以及 emotional and indirect appeals 的使用.
选项二Indirect appeals to children's psychological states or associations can limit the effectiveness of rational appeals in advertising.是说indirect appeals限制了rational appeals.而原句中并没有表达这层关系.