Critical Reasoning

In order to ensure automatic updates for commercial softwares, firms using them are required to procure an original license for each copy of the software. Firms typically purchase multiple such 'shared' licenses such that the software is supported on a WAN (Wide Area Network) network and is available to any random user on a one-license-per-computer basis. Hence, when the total number of computers accessing the software at any point equals the number of licenses procured, then any further waiting user would not be able to access the software, unless existing active users log off their licenses, making them available on the network. However, despite the 'sharing' feature of these licenses, occasionally, waiting users using a single computer have been unable to access Pro-CAD, a commercial software, even after some active Pro-CAD users had logged off.

Which of the following, if true, would MOST help to resolve the apparent paradox presented in the argument?

A. Occasional instances of network breakdown are always known to give rise to software inaccessibility issues for waiting users even after some active users have logged off the network.
B. Most commercial softwares, such as Pro-CAD, are set to restore accessibility to waiting users only after a certain number of active users working on the software have logged off the network.
C. Some commercial softwares, such as Pro-CAD, are set to restore accessibility to waiting users in order of their waiting times only, one just logged in as a waiting user given the least priority to access the software once some active users have logged off.
D. Most high-end commercial softwares, including Pro-CAD, are set to restore accessibility to waiting users only after users have logged off a certain number of computers using active licenses.
E. Service teams later reported that many Pro-CAD licenses had actually become corrupt, thus reducing the total number of valid licenses available on the network.

What is wrong with option A and C?

OA D