I'm not that sure but I'm 85% sure is B, lol.
Carmine is a shade of red. I think this refers to the red tulip changing from a green bud to a red flower. So therefore, putting on her carmine suit as in turning into a beautiful shade of red. This might symbolize change and growth.
The three friends used to be 'bad boys'. They believed that they could do many things. After seeing the presentation, they believed that they could accomplish really anything.
Four challenges that could impact domestic tourism could include natural disasters like forest fires keeping people out of an area due to the danger to life and limb, social unrest such as in Venezuela right now with the violence of the right wing in Caracas especially, poor economy with high unemployment so that many people can't afford to travel even locally, and seasonal activities that can only be done in certain parts of the year like boating in the summer and skiing in the winter.