Kami, Karya and Kirti can together weave a carpet in 4 days. Kami by herself can weave the same sized carpet in 12 days and Kirti can do it in 10 days. How long will Karya take to do the work by herself?

• A. 12 days
• B. 15 days
• C. 18 days
• D. 19 days