Final answer:
The British prime minister supported preserving Britain's trading relationship with Germany and advocated for dismantling Germany's armed forces at the Paris Peace Conference.
Step-by-step explanation:
At the Paris Peace Conference, the British prime minister supported certain positions. He wanted to preserve Britain’s trading relationship with Germany, so option 1 is correct. He also advocated for Germany’s armed forces to be dismantled, so option 2 is correct. However, he did not support breaking up Germany into two smaller countries, returning the Alsace-Lorraine to France, creating a secret alliance with Germany, or treating Germany harshly to prevent future conflicts. Therefore, options 3, 4, 5, and 6 are incorrect.