What could be the reasons for adopting contraceptive methods?
A) To maintain the population size by preventing unwanted children
B) To maintain the distance between two children and to plan the family size
C) To prevent sexually transmitted diseases
D) All of the above

Hint:Contraceptive methods include oral contraceptive pills, condoms, cervical cap, surgical methods like vasectomy and tubal ligation, contraceptive implants, diaphragm, intrauterine devices.

Complete answer:
Contraception is a method in which a couple/male/female take certain precautionary measures and use contraceptives for the same. There can be various reasons for which contraceptive methods are used.
There are a lot of pregnancies which are unwanted like rape cases, unplanned pregnnacy which can add a great number to the population, thererby increasing the population. Additionally, a lot of couples tend to keep a break between their two children and some may keep the family size upto 3 or 4. Thus, they use contraceptive methods. Also, having sex with multiple partners has a risk of causing sexually transmitted diseases like AIDS. In order to prevent this, male and females use condoms which not only works as a contraceptive method to prevent pregnancy but also helps protect from sexually transmitted diseases.
Since all of the above mentioned options (A, B & C) are correct, Option D- All of the above is the correct answer.
Thus, the correct answer is option (D) All of the above.
Note:Various birth control programs and organizations have developed throughout the world in order to make people understand about the use of contraception methods and their related benefits and harmful effects (if any).