To determine the rate at which a person's metabolism is expected to drop for each decade lived, we will consider the various given options:
A. [tex]$5-8 \%$[/tex]
B. [tex]$9-12 \%$[/tex]
C. [tex]$3-5 \%$[/tex]
D. [tex]$1-2 \%$[/tex]
Given the correct information, let's analyze option C: [tex]$3-5 \%$[/tex]. Therefore, the expected rate at which a person's metabolism drops for each decade is between 3% and 5%.
Hence, the appropriate choice that aligns with the given information is:
C. [tex]$3-5 \%$[/tex]