【正确答案】 D

【答案解析】[听力原文]
   The Nobel Prize committee in Stockholm, Sweden has awarded this year's Nobel Prize in Chemistry. "The Royal Swedish Academy of Sciences has decided to award the 2015 Nobel Prize in Chemistry jointly to Tomas Lindahl, Paul Modrich and Aziz Sancar..."
   The three award winners received the prize for their work in human DNA repair. Their work has provided knowledge on how living cells are used in developing new cancer treatments.
   Nobel Prizes are awarded each year in medicine, physics, chemistry, literature, and peace. The money comes from a bequest by Swedish inventor Alfred Nobel. The awards have existed since 1901 and have become a top award in each field.
   How many people have won the 2015 Nobel Prize in Chemistry?
数字题，问的是2015年获得诺贝尔化学奖的有多少人。由画线句子可知，三位获奖者因他们在人类基因修复机理方面的研究成就而获得该奖项。故答案为D。