Trains and spis carry ??

Explanation:

Rail freight transport is commonly used to ship cargo, including bulk cargo and consumer goods such as household cleaning products, batteries, and paint. The main types of cargo that are shipped by rail freight transport include hazardous materials, special cargo, and consumer goods.

every society, in order to meet the needs of it's people, has to answer three basic questions:

- what should we produce?

- how should we produce it?

- for whom should we produce it?

this questions must be answered in order to, option b, aid in production decisions.

every country can't produce everything, no matter how rich their land is. it may be a matter of technology, resources or geographical conditions. so, these three questions must be resolved in order to get the most of the production of each land.

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your answer is "graduates" hope this