Which sentence most clearly and concisely conveys the intended meaning?
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A
Due to the fact that there was a lack of sufficient staffing resources, the project was unable to be completed by the deadline.
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B
The project missed the deadline because of insufficient staffing.
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C
The deadline for the project was not met on account of staff being not enough in number.
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D
Staffing insufficiency caused the project deadline to experience non-completion.