The CompTIA A+ Essentials certification ensures that an individual ____. a. has learned basic project management skills such as initiating, planning and executing projects b. understands the service management processes and each of their roles in the service lifecycle c. understands computer technology, networking and security, and has the communication skills and professionalism required of all entry-level IT professionals d. has learned advanced project management skills such as identifying and mitigating project risks and preparing and maintaining a project budget