[求助]OG12 CR 94&114不明白论证思路，求教！！

Studies in restaurants show that the tips left by
customers who pay their bill in cash tend to be larger
when the bill is presented on a tray that bears a creditcard
logo. Consumer psychologists hypothesize that
simply seeing a credit-card logo makes many creditcard
holders willing to spend more because it reminds
them that their spending power exceeds the cash they
have immediately available.
Which of the following, if true, most strongly supports
the psychologists’ interpretation of the studies?

(A) The effect noted in the studies is not limited to
patrons who have credit cards.
(B) Patrons who are under financial pressure from
their credit-card obligations tend to tip less when
presented with a restaurant bill on a tray with a
credit-card logo than when the tray has no logo.
(C) In virtually all of the cases in the studies, the
patrons who paid bills in cash did not possess
credit cards.
(D) In general, restaurant patrons who pay their bills
in cash leave larger tips than do those who pay
by credit card.
(E) The percentage of restaurant bills paid with a
given brand of credit card increases when that
credit card's logo is displayed on the tray with
which the bill is presented.

114. Guidebook writer: I have visited hotels throughout the
country and have noticed that in those built before
1930 the quality of the original carpentry work is
generally superior to that in hotels built afterward.
Clearly carpenters working on hotels before 1930
typically worked with more skill, care, and effort than
carpenters who have worked on hotels built
subsequently.
Which of the following, if true, most seriously weakens
the guidebook writer’s argument?
(A) The quality of original carpentry in hotels is
generally far superior to the quality of original
carpentry in other structures, such as houses
and stores.
(B) Hotels built since 1930 can generally
accommodate more guests than those built
before 1930.
(C) The materials available to carpenters working
before 1930 were not signifi cantly different in
quality from the materials available to
carpenters working after 1930.
(D) The better the quality of original carpentry in a
building, the less likely that building is to fall into
disuse and be demolished.
(E) The average length of apprenticeship for
carpenters has declined signifi cantly since 1930.

两道OG12新题，感觉新加的题比OG11原有题要难，表述都怪怪的逻辑关系也不好理解，不知各位是否有同感？

谁能帮我解释下这两个题正确选项是如何得到的，怎么论证结论的。OG的解释看了还是不明白

第一题：hypothesize的点是CREDIT CARD LOGO~~

联系是：LOGO和TIP之间的关系

所以SUPPORT的肯定是和两者之间关系有关的选项。。。

所以定位B