You have a solution that contains 25 g of an unknown non-ionizing polymer in a 250 mL solution of chloroform (CHCl_{3}). The osmotic pressure of this solution at 25^{◦}C is found to be 0.056 atm. What is the molecular weight of the unknown solid?

A. 43,500 g mol ^{−1}

B. 1,740 g mol ^{−1}

C. 10,870 g mol ^{−1}

D. 3,650 g mol ^{−1}

E. 41,000 g mol ^{−1}