Without the specific attack vectors listed in the options, it's important to look at the general function of Xinetd and TCP Wrappers. Both are security tools used to control network access to various services. Xinetd, known as the 'extended Internet daemon', manages Internet-based connectivity outside of just the classic TCP/IP stack. It can filter by hostname, subsystems being requested, and the time periods in which services can be accessed. TCP Wrappers are used to provide a level of access control by checking the source IP address before allowing network service access. Therefore, the correct answer would likely address preventing unauthorized access and restricting network services based on source IP addresses. Based on this information, and considering typical pairs of attack vectors they might help with, B and D appear to be the most relevant choices.