Which of the following was NOT established in Article I of the Constitution? A. It vested the power to execute laws in a congress
B. It created a bicameral Legislature
C. It set qualifications for holding office in each house
D. It enumerated powers, such as regulating interstate commerce and declaring wars

This is because we can rule out choices B, C and D. They are all found in article 1. Specifically their locations are:

Choice A is the only thing left, so it must be the answer. If you look at article 2 of the constitution (section 1), then you'll find that the power to execute laws are vested in the executive branch, and not the legislative one. So this is further proof that choice A is the answer.

could you show the options for the answers? : )