Question

select the correct answer.
who built the worlds first liquid - fueled rocket?
a. robert goddard
b. konstantin tsiolkovsky
c. hermann oberth
d. neil armstrong

Explanation:

Robert Goddard successfully launched the world's first liquid-fueled rocket in 1926. Konstantin Tsiolkovsky and Hermann Oberth were theoretical pioneers of rocketry but did not build the first liquid-fueled rocket. Neil Armstrong was an astronaut, not a rocket builder.

Answer:

A. Robert Goddard