Which of the following is NOT true with respect to sexual orientation?

A) Virtually all cultures in all times have been predominantly heterosexual.
B) The environmental factors that influence sexual orientation are presently unknown.
C) Identical twins are somewhat more likely than fraternal twins to share a homosexual orientation.
D) With the help of a therapist,most people find it easy to change their sexual orientation.

Sexual Orientation

A lasting tendency of being emotionally, romantically, or sexually drawn to men, women, or either gender.

Identical Twins

Twins that result from a single fertilized egg splitting and developing into two individuals with exactly the same genetic material.

Environmental Factors

Elements within the external environment that can influence an individual's health, behavior, and ability to interact with the world, including natural, social, and built environments.