【单选题】

Questions 1 to 5 are based on an interview.At the end of the interview you will be given 10 seconds to answer each of the following five questions.

Now listen to the interview. According to the interviewee Mrs, Sutter, the mason for limiting population is that ______.A．population is directly related to consuming food and other resources which are being run out
B．underdeveloped countries have great problems in increasing productivity to produce more materials
C．people are destroying living environment
D．there is less space for people to live in