Answer:
An appropriate argumentative essay for the given topics would focus on, "D. Why parents should introduce their children to as many foods as possible while their tastes are still developing ," since you would talk about how and why parents should introduce their children to so many different kinds of foods; the essay would also talk about the outcome of whatever side you chose. If you think that they should not be introduced, then the outcome would be that your child may not be as open to new foods as a child that was introduced to them at a young age.
The other answer choices would be appropriate for an essay, but not an argumentative one. A could also work, but it is more opinionated, whereas D is a much broader subject in which people may be strongly opinionated against.