Which of the following best summarizes Anne Fausto$-$Sterling's argument about the binary understanding of sex?

Acknowledging the complexity of sex differentiation, the binary system no longer suffices and society should instead acknowledge the full spectrum of human diversity.

The binary system of sex classification should be expanded to include at least three categories.

The binary system is an accurate reflection of the natural variety in human sex characteristics.

The binary system should be replaced with a system that recognizes five different sexes.