Final answer:
The male voice type that can sing in the mezzo-soprano register is the Counter-tenor, using falsetto or reinforced falsetto to achieve the higher pitches associated with this female vocal range.
Step-by-step explanation:
The male voice type that can sing notes typically found in the mezzo-soprano register is D. Counter-tenor. A counter-tenor is a male singing voice with a range that is typically equivalent to that of a female mezzo-soprano. Counter-tenors often use a falsetto or a reinforced falsetto technique to achieve this higher pitch range. While tenors may sometimes reach into mezzo-soprano territory, counter-tenors specialize in this range and are most closely associated with it.