Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions
For a decade, that scientist has studied centenarians, looking for genes that contribute to longevity
A. people who live to be 100 or older
B. people who are vegetarians
C. people who want to be fruitarians
D. people who are extraordinary