Consider the following statements related to Thomas Malthus's theory:

A) Population increases exponentially, while food supply increases arithmetically.
B) Malthus believed physical checks like famine and war would limit population growth.
C) Preventive checks, such as delayed marriage, were considered less favorable by Malthus.
D) Malthus’s theory implies that uncontrolled population growth could lead to societal collapse.

Which of the above statements are correct?