Final answer:
Casual games are popular because they can be easily played in short bursts, do not require high-end gaming PCs, and offer immediate, low-commitment entertainment.
Step-by-step explanation:
The popularity of casual games among cell phone and Internet users can be attributed to several factors. The correct answer to this question is c) They are easy to pick up and play in short bursts. Casual games are designed to be accessible, often requiring minimal skill or experience to get started. This makes them ideal for playing during brief periods of free time, such as waiting in line or during a commute. Unlike games requiring high-end gaming PCs, casual games can run on most smartphones, contributing to their widespread popularity.
Additionally, casual games typically have simple mechanics and are not designed for intense, long gaming sessions or complex storylines, which means that players can quickly engage with the game with little time investment and do not have to remember intricate details between play sessions, providing an immediate source of entertainment without the commitment associated with more complex games.