Studies have shown that elderly people who practice a religion are much more likely to die immediately after an important religious holiday period than immediately before one. Researchers have concluded that the will to live can prolong life, at least for short periods of time.
Which of the following, if true, would most strengthen the researchers' conclusion?
a) elderly people who practice a religion are less likely to die immediately before or during an important religious holiday than at any other time of the year
b) elderly people who practice a religion appear to experience less anxiety at the prospect of dying than do other people
c) some elderly people who do practice a religion live much longer than most elderly people who do not
d) most elderly people who participate in religious holidays have different reasons for participating than young people do
e) many religious have important holidays in the spring and fall, seasons with the lowest death rates for elderly people