Answer:
Hi there!
Your answer is:
D. develop an opinion
E. check the supporting details
The personal statement part is a great debate within the language community. Some say it makes the writing informal, others argue that it's important to include why you are interested in the topic. If D. and E. combination isn't correct, add A. onto it and try again :) Each teacher will have a different opinion on the personal statement part!
The point of an argumentative essay is that you have an opinion. Making it objective nullifies the entire point of the argumentative essay!
Writing should always be formal, especially argumentative writing! By using an informal writing style, you will lose your credibility as an author!
Hope this helps!