B. Elasticity. Elasticity describes the ability of cloud computing resources to rapidly scale up or down to meet short-term changes in demand, then return to baseline when demand decreases. This on-demand adjustment is a core cloud characteristic. Why The Other Options Are Incorrect A. Efficiency. Efficiency refers to optimal resource usage and cost effectiveness, not rapid adjustment to changing demand. C. Multitenancy. Multitenancy describes multiple customers sharing the same underlying infra