According<br/>to the demand for oxygen, Escherichia coli belongs to ( ) A: Facultative<br/>anaerobes B: Obligate<br/>aerobes C: Microaerophiles D: Obligate<br/>anaerobes

Organisms that do not require oxygen for growth but grow better in its presence are called A: facultative anaerobes B: microaerophiles C: obligate aerobe D: obligate anaerobe