Guys, please keep the "we're in the same school" humour to Facebook 

To answer the OP: there is no one style that will be better, and  that's the honest truth. What matters is how well you demonstrate a perceptive analysis of the way written and visual language can be used to persuade a target audience -- that is, how well you hit the criteria. Why style is best to do that will often be the style you feel most comfortable writing in 

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I usually approached mine chronologically but still discussed how language interrelated throughout the article. So it was like half chronological, half argumentative, and half all over the place. That's right, I had three halves. 
It isn't always better to follow the article chronologically, simply because of the word 'always'. There's never going to be an "always" type thing (except for you should always hit the criteria). It just depends on how you feel you can best demonstrate your analytical skills.
Have fun on AN 
 But not too much fun, or I'll cut you.
But not too much fun, or I'll cut you.Regards, 
Brencookie.