Question

a key example of a prebuilt ______ service many companies use is a software as a service (saas) platform. automatic physical digital manual

Explanation:

Software as a Service (SaaS) is a digital service. SaaS platforms are delivered over the internet (a digital medium), allowing users to access software applications remotely. They are not physical (not tangible objects like hardware), not manual (don't rely on physical human - performed steps without digital infrastructure), and while some SaaS may have automatic features, the overarching category that SaaS fits into is digital.

Answer:

C. digital