What is the primary benefit of cloud computing?

Correct answer: Scalability, flexibility, and cost-efficiency without managing physical infrastructure

Option C is correct because the primary and most broadly recognized benefit of cloud computing is the combination of on-demand scalability, operational flexibility, and cost-efficiency achieved by consuming infrastructure as a service rather than purchasing and managing physical hardware. This allows organizations of all sizes to pay for only what they use and scale rapidly with demand. Option A is wrong because cloud computing is explicitly designed to serve businesses of all sizes, including small businesses and startups, not only large enterprises. Option B is wrong because cloud computing has no inherent effect on internet connection speed; network performance depends on the user's ISP and network conditions. Option D is wrong because cloud computing absolutely requires robust security practices; it shifts some security responsibilities to the provider but does not eliminate the need for security.