The three age system is useful for the study of

chronology

the three age are stone age bronze age and iron age.

artifacts and events of late prehistory and early history could be ordered into a chronology.

the answer is ancient European cultures

Explanation:

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.

special interest groups must step back and let the process work itself out a representative can amend it at several points in the congressional staffers must do homework and report to the floor on what they 've learned