The command useradd -m -d /srv/devops -s /bin/zsh -f 15 devops meets every stated requirement:
-m (or --create-home) creates the home directory if it is missing.
-d /srv/devops sets the exact path of the home directory.
-s /bin/zsh sets the user's default login shell.
-f 15 (or --inactive 15) places a 15-day limit after password expiry; once that grace period passes, the account is disabled automatically.
The other choices each fail at least one requirement:
Using -e 15 expects a calendar date (YYYY-MM-DD), so the value 15 is invalid.
-F 15 is not a valid option for inactivity settings in Linux useradd.
-c 15 only places a comment in the GECOS field and has no effect on account inactivity.
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CompTIA Linux+ XK0-006 (V8)
Services and User Management
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