Eosin methylene blue agar $($EMB$)$ is a selective and differential medium. The dyes in the medium inhibit most Gram$-$positive organisms. Gram$-$negative organisms such as the coliforms grow on this medium. Coliforms that are fecal in origin produce colonies with a metallic green color on EMB, while those that are non$-$fecal produce colorless colonies. You plate a urine sample onto an EMB plate and incubate it$.$ Metallic green colonies develop. From this, you can conclude that

Multiple Choice

the bacteria in the colonies are Gram$-$positive AND are rod$-$shaped.

the sample contains bacteria that are Gram$-$negative AND are non$-$fecal in origin.

the sample contains bacteria that are Gram$-$negative AND are fecal in origin

the sample contains bacteria that are Gram$-$positive AND are fecal in origin

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