C. New york's black population increased by 66 percent
His strategy Blitzkreig.
Literally meaning a lightening war, Hitler used this strategy in Poland. It was based on a co-ordinated rapid attack spearheaded by tanks and infantry along with an aerial attack by the Luftwaffe.
hope this help
On April 12, 1961, aboard the spacecraft Vostok 1, Soviet cosmonaut Yuri Alekseyevich Gagarin becomes the first human being to travel into space. During the flight, the 27-year-old test pilot and industrial technician also became the first man to orbit the planet, a feat accomplished by his space capsule in 89 minutes.
Hope this helps