Cloud vendors that are hosting hardware, operating system, database, and other software, which clients can then use to build their own applications, are said to be providing: a. Software as a Service.
b. Hardware as a Service.
c. Platform as a Service.
d. Service Oriented Architecture.
e. Service Level Agreement.

a. Software as a Service.

Explanation:

These Cloud vendors are said to be providing Software as a Service. This is because regardless of that the underlying specs are in regards to hardware, operating systems, database, etc. The vendor is selling a subscription to their cloud software which bundles all of these services together. Therefore, what they are ultimately providing is a Software that the individual can use as a service, and enjoy all of the included benefits/capabilities.

answer; i believe the correct answer is (a) all trenches must have access/egress;