In a certain mid-size city, 90% of the high- school graduates are from public schools and the other 10% are from private schools. Of the private school graduates, 80% go on to complete college but only 50% of the public school graduates complete college. What is the probability that a high school graduate from this city will complete college?

A. 0.53
B. 0.58
C. 1.3
D. 0.9
E. 0.47