The patient with the multilumen central line that was emergently inserted 3 weeks ago has the highest risk of developing a CLABSI due to the prolonged time it has been in place and the potential for infection. Other options present lower risks based on their insertion methods and durations. Thus, the correct choice is C.
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The patient with a multilumen central line emergently inserted 3 weeks ago has the highest risk of developing a CLABSI due to the prolonged duration and potential for bacterial colonization. Other options present lower risks based on insertion method and duration of placement. Effective infection control practices can significantly mitigate these risks. ;