Table 202
the Following Results Were Obtained from a Disk-Diffusion Test

Multiple Choice

Table 20.2
The following results were obtained from a disk-diffusion test for microbial susceptibility to antibiotics.Staphylococcus aureus was the test organism.
$$\begin{array} { | c | c | } \hline \text { Antibiotic } & \text { Zone of Inhibition } \\\hline \text { A } & 3 \mathrm {~mm} \\\hline \text { B } & 7 \mathrm {~mm} \\\hline \text { C } & 0 \mathrm {~mm} \\\hline \text { D } & 10 \mathrm {~mm} \\\hline\end{array}$$
-In Table 20.2,the most effective antibiotic tested was

A) A.
B) B.
C) C.
D) D.
E) The answer cannot be determined based on the information provided.