Let's look at the three statements that the claim is ineffective:
The claim is ineffective because it does not state a clear position.
-but it does state a very clear position! false!
The claim is ineffective because it expresses a first person preference.
-there is no mention of a first person preference here
The claim is ineffective because it suggests the essay will inform rather than argue.
-this is not true, it suggests that the essay will argue rather than inform.
So in total, the correct answer must be: The claim is effective.
