An educational startup has already written its proprietary $$Homework Helper$$ code, using AI to help high school students with homework. While their data storage needs are currently small, they expect their needs to grow exponentially as they increase their user base. Which of the following could help them with this?

Multiple Choice

infrastructure as a service $($IaaS$)$

virtual private network

cloud services security

platform as a service $($PaaS$)$