Concerning supply costs, if any agricultural products are required, a hard frost can devastate crops and do what to costs?

A. Cut them in half
B. Decrease them
C. Keep them steady
D. Increase them

D. Increase them

A hard frost can devastate crops and typically has the effect of increasing supply costs. To understand why, let's look at the situation more closely.

When a hard frost occurs, extremely low temperatures can damage or kill crops, particularly delicate ones like fruits and vegetables. This leads to a decrease in the overall supply of agricultural products. With a reduced supply of crops, the demand remains the same or may even increase, creating a scenario of scarcity.

As a result of the reduced supply and increased demand, prices tend to rise. Farmers may need to invest more in replanting or protecting their crops from frost, which adds to their production costs. Additionally, the reduced supply may lead to a higher competition among buyers, driving prices up further.

Given this understanding, the correct answer to your question would be:

D. Increase them

A hard frost can increase the costs of agricultural products. Therefore, the correct answer is:

D. Increase them