The correct option is C all of the above
Death
rates have declined from 25 per 1000
population in 1951 to 8.1 per 1000 in 2001
and life expectancy at birth has increased from
36.7 years in 1951 to 64.6 years in 2001.
The substantial improvement is the result
of many factors including improvement in
public health, prevention of infectious diseases
and application of modern medical practices
in diagnosis and treatment of ailments.