Which of the following observations about the US West after the Civil War are true: a. The Comstock Lode, the first major silver deposit found in the US West, was followed by major discoveries in Nevada and Colorado after the Civil War. b. Due to the abundance of silver being mined in the second half of the nineteenth century, silver-producing states in the West pushed for the adoption of a bimetallic currency standard. c. Many farmers in the Midwest and Great Plains opposed the use of silver coins and Greenbacks guaranteed by silver ore, because this would lead to deflation, which would make loan and mortgage repayments more expensive. d. Each of these statements are true.