Use the sentence to answer the question.

Question

Opals can be worth a lot of money.
Which piece of evidence supports this inference?
A. Tourists sit on the hot, dusty earth for hours in search of opals, hoping that what they find might let them retire early.
B. In the heat of day, people are nowhere to be found, each hidden in a dugout or an opal mine.
C. Coober Pedy is one of the least accessible towns in Australia, which is probably why it gained a reputation as the place where outlaws went to hide.
D. One of Coober Pedy's most popular destinations, the mine provides visitors with an opportunity to learn about the struggles of early miners.

Answer 1

A. Tourists sit on the hot, dusty earth for hours in search of opals, hoping that what they find might let them retire early.

This piece of evidence suggests that the opals are valuable enough that finding them could significantly impact a person's finances, supporting the inference that opals can be worth a lot of money.