Mumtaz, Badia and Ilya Are Partners in a Business Partnership

Mumtaz, Badia and Ilya are partners in a business partnership, called MBI. Mumtaz contributes $15,000 to the business, Badia contributes $10,000 and Ilya contributes $5,000. There is no agreement of how they will share partnership profits and losses. In addition, the partnership borrows A $30,000 from the bank. The business doesn't work out, and MBI is unable to repay the loan. The bank sues Mumtaz personally. The amount Mumtaz can legally recover from Ilya is:

A) nothing
B) $5,000
C) $10,000
D) $15,000
E) $30,000