Why dose Zhao Baige cite the research by Thomas Wire of London School of Economics in the last paragraph?
A.
Because she wants to show that family planning programs are more efficient in helping cut CO2 emissions.
B.
Because she feels proud of the benefits brought by China's family planning policy.
C.
Because she personally likes to cite figures and data to make her understandable.
D.
Because she wants to remind others that she made the research together with Thomas Wire.