Regarding Ryan's Legal Problems in Winland, Which Is a True

Regarding Ryan's legal problems in Winland, which is a true statement?

A) Ryan can rely upon the federal statutory laws of the U.S. as a defense but not the U.S. Constitution.
B) Ryan is entitled to all U.S. Constitutional rights in Winland because he is a U.S. citizen, but he cannot rely on statutory law.
C) Ryan can rely on U.S. laws as a defense only if he obtains an opinion from the office of the U.S. attorney that his operations in the U.S. have strictly complied with the law.
D) Ryan must obey the laws of Winland when operating a business in Winland and cannot rely upon U.S. laws as a defense.
E) Ryan can rely upon the federal statutory laws of the U.S. as a defense. Additionally, Ryan is entitled to all U.S. Constitutional rights in Winland because he is a U.S. citizen.