When Russia entered WW1, they had mobilized about 1.5 million soldiers. At most, the Russians had 5 million soldiers fighting. They couldn't arm all of these soldiers though, because they only had about 4.6 million weapons.
It was one of the first revolutions of its kind to occur non-violently, making it 'glorious'.
The Ottoman Empire wanted more nationalism
The answer is B. This has to be 20 or more characters so have a nice day.