Why the us was so unprepared for entry into w2

The US without a draft had only 100,000 troops. That's tiny compared to millions of Nazi soldiers. As for Pearl Harbor and Japan, the US underestimated the Japanese ability to attack the US and its strength. The US also was not in conflict with Japan and did not expect a sneak attack by them early in the morning.

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.