Final answer:
The intersexed are people with a mixture of male and female anatomy (option A). Intersex is a biological variation present from birth or noticeable later in life, and it complicates the binary conception of sex and gender.
Step-by-step explanation:
The intersexed are individuals with anatomical or chromosomal traits that do not fit the typical definitions of male or female. Specifically, they fall under option A) 'with some mixture of male and female anatomy.' This includes a spectrum of conditions that can result in a variation of physical characteristics, such as hormones or reproductive organs, that are not exclusively male or female.
Intersex traits can be identifiable at birth or may present themselves during puberty or later in life. Intersex is a natural human variation, and it is estimated that around 1.7 percent of the population may not fit the traditional categories of male or female at birth. Due to the complexity of sex development, which involves an interplay of chromosomes, hormones, and environmental factors, gender cannot be strictly categorized into a binary system.
There is a significant shift in the medical community to move away from non-essential surgeries for intersex infants, advocating that any decisions about surgery be postponed until the individual can participate in the decision-making process. Cultural understanding of intersex conditions is also evolving, with increased recognition of the fluidity of sex and gender beyond a binary framework.