Answer:
B) she was very calm under pressure
Explanation:
A project manager is a designation in which the management and the responsibility of the entire project lie in the hands of an individual. The responsibilities of planning, running and the execution of the project is undertaken by the project manager.
From the given options, the soft skill of keeping very calm under pressure will be the most relevant for Rachel. All the other three options are the skills relevant for a specific proficiency in the technical field. To be a project manager, calmness, and efficiency to work under pressure is required.