Which of the following is a common indoor mold species?

The correct answer encompasses all specified species, including Penicillium, Aspergillus, and Cladosporium, as they are all common indoor mold species. Each of these molds can thrive in indoor environments where conditions such as humidity and moisture are conducive to mold growth.

Penicillium is notable for its green or blue-green colonies and is often found on food and building materials. Aspergillus is another common indoor mold that can have various appearances and is frequently present in dust and decaying materials. Cladosporium can grow on a wide range of surfaces, including wood and textiles, making it prevalent indoors as well.

Understanding that all these molds have distinct characteristics and environments where they thrive is essential for identifying and addressing indoor mold issues effectively. Hence, the answer that includes all of them accurately reflects the reality of common indoor mold species.