Which observatory detects X-rays and gamma rays?
A. The Hubble Space Telescope
B. The Spitzer Space Telescope
C. The Compton Gamma Ray Observatory
D. The Chandra X-ray Observatory

In an effort to japan recover from the devastating effects of the 1929 depression, japanese military leaders in the 1930s formed an alliance with nazi germany negotiated more trade treaties with the soviet union closed its doors to western trade adopted a policy of imperialist expansion