Marta is recovering from a very bad flu, she likely to need rehabilitation only if she was sick for more than two weeks. The correct option is C.
If Marta's flu significantly impacted her physical state, such as by causing muscle weakness, loss of mobility, or other issues that would necessitate recovery and rehabilitation efforts.
The requirement for rehabilitation may not be determined solely by the length of the illness; it may also depend on the specific effects of the flu on her general health and wellbeing.
Thus, the correct option is C.
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