In the late 1800s, why did industrialists support the gold standard?
a)the gold standard kept the price of gold flexible, which made the value of currency go up and down.
b)the gold standard kept the price of gold fixed, which kept both prices and wages down.
c)the gold standard kept the price of gold fixed, which caused wages to steadily increase.
d)the gold standard kept the price of gold flexible, which also made the price of silver flexible.

c)The gold standard kept the price of gold fixed, which caused wages to steadily increase.

Explanation:

Once the price of the gold was fixed, the cost of different currencies around the world was steady, this allowed to also have standarized prices all over the world, based on something that won´t change, the price of gold, this meant that wages could steadily increase and this couldn´t be lost by a sudden change in the gold price, loosing purchasing power.

interdependence is when all participating groups and individuals depend on each other. if you depend on one anothers goods, you end up trading in order to get the items you're looking for. (for ex: if i have food and you have water, we trade in order to depend on each other to live)