Carl works as a security manager for a city government. One of his responsibilities is to maintain the city's security policy, a portion of which specifies access controls with respect to contractors. Contractors are expected to use their own laptop computers when working on city projects. They are also allowed to connect to the city's computer network. What is the primary reason this is a problem for Carl?

A$.$ The laptops might not have the same security safeguards in place as the city's laptops.

B$.$ The laptops do not run the same version of Windows as the city laptops.

C$.$ The laptops might be available for personal use.

D$.$ The laptops might have better security safeguards in place than the city's laptops.