Final answer:
SaaS and IaaS is the best cloud computing service for Sifers Grayson's needs. Therefore, the correct answer options is a)
Step-by-step explanation:
Based on the requirements mentioned, the cloud computing service that would best meet the needs of Sifers Grayson is SaaS and IaaS.
SaaS (Software-as-a-Service) is a cloud computing service that provides users with access to software applications over the internet. It eliminates the need for specialized software and allows for global access and easier administration, making it a suitable choice for sifers-grayson's limited IT team.
Additionally, IaaS (Infrastructure-as-a-Service) provides virtualized computing resources over the internet, eliminating the need for specialized hardware. It complements SaaS and can help Sifers Grayson lower costs by outsourcing infrastructure management.