Why Did Scholar Thomas Malthus Argue That Sexually Explicit Material

Why did scholar Thomas Malthus argue that sexually explicit material should be suppressed?

A) Children's schoolwork could be negatively affected if they were thinking about sex.
B) Original sin by Adam and Eve had horrible consequences.
C) Sexually explicit material would lead to an increase in the population that would overtax diminishing natural resources.
D) The only sexual thoughts a person should have should be towards their partner in a Christian marriage.