All of the Following Are Disadvantages to Cloud-Based Computing EXCEPT

Multiple Choice

All of the following are disadvantages to cloud-based computing EXCEPT:

A) the promise of elasticity is not fulfilled because the model will not adapt to changing requirements.
B) live migration from one environment to another is a challenge.
C) DBaaS is still struggling to provide ACID properties of databases.
D) the visibility of costs of data management is better.