The statement that explains the Federal Government's approach to economic growth in the late 1800s is <em> </em><u><em>improved productivity,</em></u><em> which is the main cause of economic growth. </em>
Explanation:
<em>"the emphasis was on</em><em> economic performance and how it was affected by new technologies, especially those that </em><u><em>improved productivity,</em></u><em> which is the main cause of economic growth. </em>
