Phyllis was crossing the street at a crosswalk, but did not look both ways. As she walked, Phyllis was hit by a car driven by Brett, and immediately afterwards, she was struck by a car driven by Andrew. As a result of these collisions with the cars, Phyllis suffered severe injuries. Although it was impossible to determine which portion of Phyllis's injuries was caused by Andrew and which by Brett, at the trial of Phyllis's suit, the jury determined that Andrew was $20 \%$ negligent, that Brett was $40 \%$ negligent, and that Phyllis was $40 \%$ negligent. It was further determined that Phyllis had suffered $ 100,000$ in damages. Phyllis had already received $ 10,000$ from her group medical insurance plan. Andrew had a $ 500,000$ auto liability insurance policy, and Brett is now insolvent. In a pure comparative negligence jurisdiction, how much will Phyllis recover in damages from Andrew?
A. $ 90,000$.
B. $ 60,000$.
C. $ 50,000$.
D. $ 20,000$. 
Choose A, B, C or D as your solution.
B