Natural growth of population is the outcome of which of the following?

A. Crude Birth Rate
B. Crude Death Rate
C. Migration
D. Marriages

Select the correct answer from the codes given below:
Codes:

A) Only A

B) Only C

C) B and D

D) A and B

This MCQ is part of the UP PSC Previous Year Questions (PYQs) series, focusing on UPPSC Prelims 2018 (GS Paper I)