Last Elective: AP Chemistry or AP Statistics?

I am currently a sophomore and I am choosing classes for my junior year. So far my schedule is:

Environmental Engineering and Sustainable Design, AP US History, AP Language and Composition, AP Calculus BC, and AP Computer Science.

I have narrowed down my last elective to either AP Chemistry or AP Statistics. I am interested in a math or engineering major, which is why I am interested in AP Statistics. However, I feel like AP Chemistry will give me a more solid foundation in the sciences as I will have taken AP Biology and I will be in AP Physics as a senior. Based on my other classes, which one should I choose?