In a Recent Research Paper Published by the European Central

In a recent research paper published by the European Central Bank,two economists concluded that U.S.tax revenues would

A) increase if labor taxes were increased or if capital income taxes were increased.
B) increase if labor taxes were increased, but tax revenues would decrease if capital income taxes were increased.
C) decrease if labor taxes were increased, but tax revenues would increase if capital income taxes were increased.
D) decrease if labor taxes were increased or if capital income taxes were increased.