There are many proposed solutions to traffic congestion in metropolitan areas. one solution has been prove ineffective: in fact, it promotes more cars and drivers on the roads. which solution is it? a) automate the driving process itself. b) build more infrastructure including more roads, tolls, and car-pooling lanes. c) using wireless vehicle-to-vehicle communication, cars could talk to each other in an attempt to keep traffic flowing more smoothly. d) a smartphone app that works like a social network for drivers, combining online maps with updates from other drivers about traffic jams, road works and accidents.

Option B, Build more infrastructure including more roads, tolls, and car-pooling lanes.

Explanation:

When an infrastructure is built it allows more vehicle to go through it. It proves to be useful only for some time just after  the construction. However, in long run it again proves to be inefficient as efficient traffic management require efficient traffic planning and not construction of more infrastructure.

Also addition of infrastructure,  increases the vehicular population thereby adding more vehicles to already existing mismanaged traffic.

Hence, option B is the right answer

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."    

a metamorphic rock would be formed.