The catalytic converter, a required component for automobile exhaust emission control systems, converts carbon monoxide into a. pure carbon and oxygen b. carbon dioxide c. carbonic acid d. carbon monoxide (the catalytic converter is designed to remove gases other than carbon monoxide)

B. Carbon dioxide

Explanation:

A catalytic converter is designed and placed in the exhaust of most automobiles to remove harmful gases from escaping into the environment.

The converter uses palladium and platinum which are both catalyst to reduce harmful gases such as nitrogen oxide which causes acid rain, carbon monoxide which affects human haemoglobin and other hydrocarbons into less harmful ones.  

The catalytic converter helps to convert carbon monoxide, a product of incomplete combustion of hydrocarbons into less harmful carbondioxde. Carbon monoxide is a very toxic gas. It causes harm to both plants and animals as well.

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation: