Answer:
C) the rock surrounding the ore was too hard for picks and hammers.
Step-by-step explanation:
Miners realized that the newly discovered Comstock Lode would require different technology than usual instruments of mines in California because the rock surrounding the ore was too hard for picks and hammers. The rocks surrounds the ore is very hard which can't be broken with the help of picks and hammers so for the extraction of ore, new technology is needed to extract the ore from the rocks.