Which of the Following Is NOT True About Research in Language

Which of the following is NOT true about research in language, gender, and sexuality?

A) Researchers generally take the approach that sex refers to a binomial, biological construct while gender refers to a more fluid, social construct
B) While language can reflect many different aspects of a person's identity, such as regionality or ethnicity, research has found that the connection between language and gender has the largest effect on one's idiolect
C) Even though people have researched sexist language for decades, there is no one standard way that is taught and/or can be used for avoiding sexist language
D) Lakoff's discussion of how "women's language" differed from "men's language" included such findings as women tell fewer jokes, use more descriptive terms, and use more tag questions
E) Much of the current research in the field investigates language as a reflection of sexual orientation and/or gender identity