Exam XK0-005 topic 1 question 243 discussion

A Linux engineer finds multiple failed login entries in the security log file for application users. The Linux engineer performs a security audit and discovers a security issue. Given the following:

# grep -iE '*www*|db' /etc/passwd
www-data:x:502:502:www-data:/var/www:/bin/bash
db:x:505:505:db:/opt/db:/bin/bash

Which of the following commands would resolve the security issue?