The entry of the United States into WWI ... helped Russia
helped Russia

was applauded by Germany
was applauded by Germany

did not make much difference to the fighting
did not make much difference to the fighting

was a decisive factor that turned the tide for the Allies.

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.

zheng he was a chinese explorer who lead seven great voyages on behalf of the chinese emperor. his seven total voyages were diplomatic, military, and trading ventures, and lasted from 1405 – 1433. however, most historians agree their main purpose was to promote the glory of ming dynasty china.

explanation:

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.

he risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation: