American citizens may belong to interest groups at one time. a) as many as two b) any number of c) no more than four d) as many as three

for hobos it was a very hard time most hid on the sides of the railroad tracks causing people to get bulls and get them off sometimes causing in fatal death they couldnt get people to give them money because the   people were also in need of money

ecologists can be teachers or research scientists. they can work for environmental organizations like the nature conservancy or for the government. they may work at museums, zoos and aquariums.