Why was the Japanese attack unexpected? Japan was about to surrender to the Allies. Japan vowed not to attack U. S soil. The United States was in peace talks with Japan at the time. Japan was in the midst of negotiations with Germany.​

The answer is A.

Explanation:

At the time, Japan was about to surrender the the Allies. This is why the attack on Hiroshima and Nagasaki was so unexpected

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering

b is correct

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