Read the following passage and answer the question.
'All new employees at the consulting firm Axiom Partners are required to complete a mandatory ethics training program within their first 30 days of employment. The program is offered in two formats: a self-paced online module or a two-day in-person workshop. While the in-person workshop is recommended for employees in client-facing roles, it is not compulsory. Last month, every new hire from the Sales department enrolled in the in-person workshop, though some new hires from the Analytics department chose the online module.'
Based only on the information provided, which of the following statements must be true?
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A
At least one new hire from the Analytics department did not attend the in-person workshop.
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B
No new employees at Axiom Partners can begin client work until they complete the ethics training.
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C
All new hires in client-facing roles are required to attend the in-person workshop.
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D
The online ethics module is shorter than the in-person workshop.