Consider a survey conducted of cars in a certain country. one aspect of the study is to

Aspects of a study conducted of cars in a certain country will be to determine the general traits of consumer buying and motorists. This could include: whether a car runs on diesel or electricity to gain information for a survey on pollution of motor vehicles; also, size of a car, the frequency of use, the purpose of use, how old a car is and how many passengers are generally seated in the car. All of these factors can be used to glean invaluable information for the automotive industry, as well as for scientific studies and governments.

Carbon monoxide is usually more dangerous indoors.

This would be a true statement