What does it mean if "it is not nearly as cold as yesterday"?

The phrase "it is not nearly as cold as yesterday" implies that the current temperature is significantly warmer than it was the previous day. The use of "not nearly as cold" indicates a comparison where the current conditions are less severe in terms of coldness. Therefore, option B is accurate because it expresses that today's weather conditions are better, meaning warmer, compared to those experienced yesterday.

The other options do not align with this interpretation; the statement does not suggest a significant drop in temperature, nor does it indicate that temperatures are identical or comparable to the coldest recorded day. This clarifies why option B is the appropriate choice.