Answer: D.) Divided attention.
Explanation: The ability of individuals to multi-task or engage in the performance of multiple functions or task simultaneously exhibits the concept of divided attention whereby an individual is successfully able to allocate the necessary amount or level of attention or focus required to perform each specific task. Divided attention infers that shared attention is utilized in the performance of multiple task simultaneously such as reading a script, replying to messages, listening to music and so on. If the individual's attention isn't divided between the different engagements, simultaneously performing those task would be impossible.