Final answer:
The false statement is that scientific research supports that heterosexual orientation is a choice made in life, whereas evidence shows it's not a choice but a stable characteristic.
Step-by-step explanation:
The false statement about heterosexual orientation development is: B) Scientific research supports the idea that heterosexual orientation is a choice made at some point in an individual's life. This statement is incorrect because current scientific consensus indicates that sexual orientation, including heterosexuality, is not a voluntary choice but rather a complex trait arising from genetic, hormonal, and environmental factors. Medical and psychological authorities do not consider heterosexual orientation a mental disorder, and the process of understanding and accepting one's sexual orientation can indeed vary among individuals. There is extensive evidence suggesting that sexual orientation is not a choice and is instead a stable characteristic of a person.