Death Rate Outpacing Birth Rate Despite Migration Stability

Steps:

• Population change = (births - deaths) + net migration.
• Increased birth rate raises births, but population decreased, so deaths or net out-migration must exceed this rise.
• With no migration change in option C, rising death rate can offset higher births.
• Verify other options contradict population decline.

Why C is correct:

• Per population growth formula, if death rate rises more than birth rate, natural increase (birth rate - death rate) becomes negative; zero net migration keeps total change negative.

Why the others are wrong:

• A: Falling infant mortality lowers overall death rate, boosting population growth with higher births.
• B: Rising net immigration adds people, increasing population despite birth rise.
• D: Falling death rate enhances natural increase, leading to population growth with higher births.

Final answer: C