Final answer:
The most critical aspect in enabling mobile computing is network connectivity. Battery life, processing speed, and screen size are also important but not as critical.
Step-by-step explanation:
The most critical aspect in enabling mobile computing is network connectivity. A strong and reliable network connection is essential for accessing the internet, downloading and uploading data, and using online services. Without network connectivity, mobile devices would be limited in their functionality.
While battery life is important for ensuring that mobile devices can operate for extended periods without needing to be charged, it is not considered the most critical factor. Similarly, processing speed and screen size are important for performance and user experience, but they do not directly enable mobile computing without network connectivity.
The question you have asked pertains to what is most critical in enabling mobile computing. Among the options given, D) Network connectivity is generally considered the most critical aspect.
While battery life, processing speed, and screen size also play significant roles in the usability of mobile devices, network connectivity is fundamental for mobile computing as it allows devices to access the internet, exchange data, and perform the majority of their functions that are dependent on communication with other systems.