The Hubble Space Telescope was launched in: A .1989
B. 1990
C. 1991
D. none of the above

B. 1990

This article is part of the NASA Knows (Grades 5-8) series. The Hubble Space Telescope is a large telescope in space. It was launched into orbit by space shuttle Discovery on April 24, 1990. Hubble orbits about 547 kilometers (340 miles) above Earth.

positive reinforcement? ?

i think they are all correct

explanation:

they seem good