求助gwd上的两道题，总想不通

Many people suffer an allergic reaction to certain
sulfites, including those that are

commonly added to wine as preservatives.  However, since there are several wine

makers who add sulfites to none of the wines they produce,
people who would like to

drink wine but are allergic to sulfites can drink wines
produced by these wine makers

without risking an allergic reaction to sulfites.  Which of the following is an assumption

on which the argument depends?

A.     
These wine makers have been able
to duplicate the preservative effect produced

by adding sulfites by means that
do not involve adding any potentially allergenic

substances to their wine.

B.     
Not all forms of sulfite are
equally likely to produce the allergic reactions.

C.     
Wine is the only beverage to which
sulfites are commonly added.

D.    
Apart from sulfites, there are no
substances commonly present in wine that give

rise to an allergic reaction.

E.     
Sulfites are not naturally present
in the wines produced by these wine makers in

Which of the following most logically completes the
passage?

Concerned about financial well-being of its elderly
citizens, the government of Runagia

decided two years ago to increase by 20 percent the
government-provided pension

paid to all Runagians over 65.  Inflation in the intervening period has been
negligible,

and the increase has been duly received by all eligible
Runagians.  Nevertheless,

many of them are no better off financially than they were
before the increase, in large

part because ________.

A.       
They rely entirely on the
government pension for their income

B.       
Runagian banks are so inefficient
that it can take up to three weeks to cash a

pension check

C.       
They buy goods whose prices tend
to rise especially fast in times of inflation

D.       The pension was increased when the number of elderly Runagians below
the

poverty level reached an
all-time high

E.       
In Runagia children typically
supplement the income of elderly parents, but

only by enough to provide them
with a comfortable living