Fix the grammatical mistakes: This is due to developed countries having an aging population coupled with higher cost of living.
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The first two sentences are correct.
The first sentence is correct. The second is incorrect.
The first sentence is correct. The second sentence is incorrect.
The second sentence is incorrect.
The first sentence is correct. The second sentence is incorrect.
The first sentence is correct. The second sentence is incorrect.
The first sentence is correct. The second sentence is incorrect.
The first sentence is correct. The second sentence is incorrect.
The first sentence is correct. The second