Final answer:
The primary concern regarding information systems supporting virtual teamwork is the lack of data security, which is crucial to protect sensitive information in collaborative virtual environments.
Step-by-step explanation:
One concern regarding information systems that support virtual teamwork is B) Lack of data security. While technologies such as cloud storage, collaboration platforms, and electronic conferencing contribute to improved collaboration, enhanced communication, and may even reduce the necessity for face-to-face meetings, they also bring about concerns of data security. The sharing of information and communications on these platforms must be protected against unauthorized access and data breaches to safeguard sensitive information. Instances of large-scale data breaches in various organizations highlight the significance of robust security measures in virtual environments.