Which of the Following Is the MOST Likely Way That

Multiple Choice

Which of the following is the MOST likely way that scientists first identified streptomycetes?

A) through the observation that certain bacteria had a unique morphological structure (i.e., not a rod, sphere, etc.) in culture
B) through the observation that microorganisms did not grow in close proximity to certain bacteria in culture
C) through the collection of sequence data from the environment
D) through the observation of large bacteria (>100 M) in culture