You will be given a definition of a task first, then some input of the task.
In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".

[header] How to know if your child is too skinny [title] Weigh your child regularly. [step] A good sign your child is is healthy and not too skinny is if they are steadily gaining weight as they grow. Weighing your child regularly can help you calculate things such as body mass index (bmi) as well as ensure your child is adding weight as they get taller. <sep> (A) This can help you place him where he fits best in the equation. Generally, bmi ranges between 130 and 69.6. (B) [substeps] Use a scale that is properly calibrated. You may even want one that can weigh to fractions of a pound this will give you the most accurate reading of your child's weight. (C) Bmi refers to how many calories someone is consuming each day and how many calories they eat in a day. People who weigh too heavy weigh themselves as a percentage based on age or gender. (D) This can also show your child that healthy weight is a sign of age. Bmi is the " weight required " of any person over the age of 12 in any sexual situation.
Output:
B