Which of the following sentences is most clearly written?

The first option is the most clearly written because it smoothly connects all the responsibilities of the position in a single, cohesive sentence. It effectively outlines the primary duties – typing, filing, and preparing travel expense claims – while also including the additional duty of acting as a receptionist. The use of "in addition to" provides a clear and logical progression of the tasks without breaking the flow, making it easy to understand the overall job requirements at once.

In comparison, while the second option attempts to list the duties, it introduces a fragment with "In addition to," which disrupts the flow and may confuse the reader about how the responsibilities are linked. The third option "plus" is informal and less precise than "in addition to," which can affect the tone expected in formal job descriptions. Lastly, the fourth option uses "will have," which may imply uncertainty about the responsibilities rather than stating them as requirements of the position, leading to potential ambiguity. Thus, option A stands out for its clarity and formal structure in communicating the role's expectations.