The given table shows the number of subscribers, three newspapers A, B and C have in 4 regions of the country, W, X, Y and Z. The country is divided into these 4 regions only. Each subscriber subscribes to only 1 newspaper. After newspaper B reduces its price by 20%, 20% of subscribers of newspaper A and 40% of subscribers of newspaper C switch to newspaper B, then revenue of newspaper B Increases by ______.
| Newspaper/City | W | X | Y | Z |
| A | 20 | 30 | 40 | 10 |
| B | 20 | 40 | 30 | 10 |
| C | 40 | 20 | 30 | 10 |
1
32%
2
40%
3
60%
4
28%