In Your Microbiology Lab,your Class Is Identifying Bacteria

In your microbiology lab,your class is identifying bacteria.You are using dichotomous keys to aid in the identification process using the data from a variety of biochemical tests.What problems do you foresee in this procedure,using the key?

A) Dichotomous keys are too sophisticated to read properly,so you are worried that there will be a large degree of error in your identification.
B) Dichotomous keys are not valid for identification.
C) The dichotomous key does not contain information on your bacterium.
D) If you misread a biochemical test or write down the wrong result,the key will likely take you to an alternative organsm that is not your unknown bacterium.