About Question enthuware.ocpjp.v21.2.3087 :

[nnavlani]

I know why answer C is right, but then the question I have is why answer A is wrong?

public List<Integer> getList(){
// why is this answer incorrect ???

[admin]

Because List<Integer> is not a subtype of List<Number>. Go through the rule of covariant returns given in the explanation. It shows two hierarchies of generic types. Read that carefully.

[tommchris]

The exact content of the question (what it asks) is not visible from the publicly-listed forum excerpt I found — you’ll likely need to be logged in or access the question via your Enthuware account to view the full question. Bloodmoney Game