The town of isle is on a small island connected to big city by a single bridge . most of the residents of isle work in big city. as. result, the bridge becomes very congested for 2 hours each day at the typical morning and evening commute times. which of the following policies considered by the mayor of isle would likely be most effective in alleviating the congestion? a) a fixed toll for the bridge payable by every vehicle crossing the bridge at all days and timesb) a variable toll for the bridge payable only by vehicles crossing the brudge during the congested cimmute timesc) any vehicle crossing the bridge at any time must have a sticker ppaid for with a one time fee of $25d) a press conferecne in which the mayor requests that people try to cross the bridge earlier or later than the typical commute times