In a week time I'm taking an exam. I want to know whether I can say 'I have chosen' or not. It is present perfect too.
The task is:
You would like to go on a party. Look at the picture and decide which outfit would suit you best. Justify your opinion.
The problem is that English is not my native language, and my teacher said that "I have chosen is wrong," but (as far as I know) it also indicates finished action: "I have just done my homework, I have already seen the film." Why is it wrong then if it is at all? Other options have been suggested, e.g. I am choosing, I chose, or I choose.
Anyway, I'm not convinced, as they all refer to different tenses. Why would I've chosen be wrong?