Answer: stress management and willingness to travel
Step-by-step explanation:
Based on the scenario described in the question, Option A and C are both wrong as she doesn't need mechanical knowledge. Mechanical knowledge has to do with one's ability to be able to understand and use tools. She also doesn't need customer service as she isn't attending to customers or anyone.
Since she had to quickly go to Atlanta to put the finishing touches on the project, what she needs is her ability to manage stress and also her willingness to travel.