What type of ship was not in the harbor during the pearl harbor attack?

American aircraft carriers

Explanation:

One of the most interesting things about the Pearl Harbor attack is what ships were not present, the American aircraft carriers. In 1941 the aircraft carrier was still considered by most naval leaders to be a support to fleets of battleships.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;

d) iowa i believe is the answer