I'll give you a question, please answer with step-by-step reasoning process. What kind of parents make the happiest child?
Options:
- birth
- act of sex
- loving couple
- parents
- adoption

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Loving couple make the house pleasant. Children are happy with loving couple. Loving couple can be parents. Loving couple are people.
The answer: loving couple.