Answer:
One of the biggest developments in communication came in 1831 when the electric telegraph was invented.
Explanation:
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The answer to your question is True. The supreme court can rule certain laws unconstitutional through cases.
Answer: A: variable cost
A cost that rises or falls depending on how much is produced is variable cost.
Explanation:
Variable cost refers to cost that change in proportion to the amount of goods produced. It increases or decreases depending on the volume of production. It rises as a result of increase in production and fall as a result of decrease in production. Examples are: cost of raw materials, packaging, labour involved in direct manufacturing process and so on.
