Within a Large Metropolitan Area, 20% of the Commuters Currently

Multiple Choice

Within a large metropolitan area, 20% of the commuters currently use the public transportation system, whereas the remaining 80% commute via automobile. The city has recently revitalized and expanded its public transportation system. It is expected that 6 months from now 40% of those who are now commuting to work via automobile will switch to public transportation, and 60% will continue to commute via automobile. At the same time, it is expected that 20% of those now using public transportation will commute via automobile and 80% will continue to use public transportation. ​
What percentage of the commuters are expected to use public transportation 6 months from now?
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A) 40%
B) 48%
C) 42%
D) 46%
E) 44%