6d. Which is not an effect of the Jones Act? Which is not an effect of the Jones Act? Multiple Choice high foreign competition for U.S. ship builders increased shipping costs for U.S. companies higher prices for U.S. consumers especially those in Puerto Rico Multiple Choice high foreign competition for U.S. ship builders increased shipping costs for U.S. companies higher prices for U.S. consumers especially those in Puerto Rico higher CO2 emissions related to greater use of road and rail shipping increased demand for rail and truck transport 6d. Which is not an effect of the Jones Act? Which is not an effect of the Jones Act? Multiple Choice high foreign competition for U.S. ship builders increased shipping costs for U.S. companies higher prices for U.S. consumers especially those in Puerto Rico Multiple Choice high foreign competition for U.S. ship builders increased shipping costs for U.S. companies higher prices for U.S. consumers especially those in Puerto Rico higher CO2 emissions related to greater use of road and rail shipping increased demand for rail and truck transport