Which of the Following Scenarios Demonstrates the Core Job Characteristic

Which of the following scenarios demonstrates the core job characteristic of variety?

A) Dmitri has to constantly perform before an audience that lets him know how he is doing.
B) Anastasia has to spend most of her time out of the office, during which she supervises herself.
C) Mariya has to formulate policies that affect thousands of her constituents.
D) Ivan has to track a project all the way from conception to implementation.
E) Maxim has to answer the phone, provides tours, write reports, and make appointments.