What is the size range of Archaebacteria?

Archaebacteria, or archaea, are known for their unique characteristics and can vary significantly in size. The size range of these microorganisms typically falls between 0.1 to 15 micrometers (μm), making the first choice accurate. This range encompasses a variety of Archaebacteria, which often live in extreme environments, such as hot springs or salt lakes, and can have diverse shapes and dimensions. The smaller end of this range allows for the presence of very tiny organisms while still including larger species. Such a breadth of sizes reflects the adaptability and diversity of these ancient microbes.

The other options suggest narrower size limits, which do not encompass the full spectrum of sizes observed in Archaebacteria, and thus do not accurately represent the size range of these organisms.