Which type of mold is most commonly associated with allergic reactions?

Cladosporium is commonly associated with allergic reactions because it is widely present in the environment, including indoor and outdoor settings. It is known for releasing allergens that can trigger respiratory issues, particularly in sensitive individuals. Its spores can be inhaled, leading to symptoms such as sneezing, runny nose, itchy eyes, and asthma exacerbations.

While other molds, such as Aspergillus and Penicillium, can also cause allergic reactions and may produce mycotoxins, their primary concerns often relate more to respiratory illnesses and infections rather than general allergic reactions. Stachybotrys, often referred to as "black mold," is primarily noted for its potential to produce mycotoxins that can lead to serious health issues, but it is less commonly associated with typical allergic responses compared to Cladosporium.

Thus, because Cladosporium is prevalent and frequently encountered, it plays a significant role in allergic conditions in many people, making it the correct choice.