The probability that an individual owns a tablet computer is 0.4. The probability that a person owns a smart phone given that they own a tablet computer is 0.9. The probability that a individual owns a smart phone given they do not own a tablet computer is 0.6. What is the probability that an individual owns a tablet computer given that they own a smart phone?
A. 0.143
B. 0.856
C. 0.500
D. 0.280