听力原文： CHINA'S population will officially reach 1.3 billion by Thursday, according to the National Bureau of Statistics. Some experts have claimed the government's family planning policies of the past 30 years delayed the arrival of that figure by four years. It is expected to increase by about 10 million people annually and to peak at 1. 46 billion in the mid 2030s, Xinhua has quoted population experts as saying last year.
What's true about China's family planning policies？

A. Not work well.
B. Increase the population number.
C. Delay the increase of population.
D. It will not exist in the year 2030.