If per capita trash generation is constant over time,this implies that:

A) per capita consumption of solids has also been constant.
B) per capita consumption of goods and services has also been constant.
C) total consumption of solids has also been constant.
D) total consumption of goods and services has also been constant.

If per capita trash generation is constant, it implies that the amount of solid waste produced by each person has remained the same. Therefore, it is likely that the consumption of solids, which includes goods such as food and materials for construction, has also been constant over time. However, this doesn't necessarily mean that the consumption of goods and services as a whole is constant, as services do not necessarily generate solid waste in the same way that goods do.