Which METAR report includes light patches of drizzling rain?

In the context of METAR reports, the inclusion of specific weather phenomena is denoted by standardized abbreviations within the report. The key to identifying light patches of drizzling rain lies in understanding these abbreviations correctly.

The correct choice indicates "-BCDZRA," where "B" refers to "billowing" or "light." The term "DZ" stands for "drizzle," and "RA" signifies "rain." The combination of "BCDZRA" implies that there are light patches of drizzling rain occurring at the time of the observation. This specific notation provides a clear indication that the precipitation observed is light drizzle mixed with rain, hence the inclusion of "B" at the front highlights the light intensity.

In contrast, other reports may aggregate rain differently, as evidenced by their abbreviations. Choices that contain "RA" alone indicate rain without specificity regarding its intensity—meaning it could be heavier rain rather than light. Additionally, "DZ" (drizzle) in certain contexts, denoting it independently or without a preceding "B" for "light," doesn't clarify the intensity, leaving the reader uncertain about whether the rain is considered severe or light.

Thus, the choice highlighted indicates very precisely the presence of light patches of drizzling rain