Please help I dont know what to wear to this event?

Do NOT wear the short shorts its not businessy enough. I think that you should def wear the cardigan but wear the hot pink t shirt under to give it some POP. Choice three is perfect because its the proper balance of business and casual. Now, I do know that number three is your everyday wear but the hair and accessories will make it a little different from your usual outfit. Good Luck! I hope you look absolutely adorable!