You receive a flyer in your mailbox petitioning for a new bike lane to be added to the road in front of your house. you would lose 3 feet of the property in your front yard, but your roads would be safer for bicyclists. you are asked to attend a town hall meeting to support the new initiative. the mayor plans to go to get an idea of what the general consensus is among the town residents. what type of bias will likely result from him basing town consensus on the opinions of town hall attendees?