Company A provides a critical manufacturing part 30% of the time, Company B provides the same part 50% of the time and Company C provides the part the rest of the time. There is a 10% chance of the part being defective if provided by Company A, a 30% chance of the part being defective if provided by Company B, and a 70% chance of the part being defective if provided by Company C. What is the probability that the part came from Company B and is defective?
A. 0.15
B. 0.32
C. 0.4688
D. 0.4375