The two main obstacles that United Sates mine workers faced were 1) Very dangerous conditions, in which many people lost their lives, and 2) A lack of good and reliable pay for their labor.
The Answer is A
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Answer:
Matels like Gold and Silver
Explanation:
The Sumerians were well known for their metalwork, a craft at which they were excellent. Most of the trading done in Ur (Sumerian city-state) as importing happened here. Imported goods hold valuable metals and semi-precious stones such as gold, silver, carnelian and lapis lazuli. Gold maintained for religious functions as well as in serving as personal ornaments, weapons etc.