The phrase "to have a choice" means that you are able to select between different options or decisions. It means you have the freedom to make a decision based on your preferences or what you think is best. Full definition
If one does not have the choice of doing evil then one does not completely have free will. (religion.blogs.cnn.com)
When shoppers have a choice between many product options or variations of a product, successful shopping experiences make those product choices tangible and immediate. (entrepreneur.com)
«As you may assume, the political party bosses are not happy allowing the voters to exercise their constitutional rights in having a choice in who is representing them,» he said. (nystateofpolitics.com)