Concept:
Space exploration is conducted by specialized national agencies. While many countries have space programs (ISRO in India, JAXA in Japan, ESA in Europe), one specific agency was the pioneer of the lunar landings.
Step 1: Full Form and Affiliation.
NASA stands for the National Aeronautics and Space Administration. It is an independent agency of the executive branch of the federal government of the United States of America.
$\text{NASA} = \text{National Aeronautics and Space Administration}$
Step 2: Historical Context.
NASA was established in 1958, succeeding the National Advisory Committee for Aeronautics (NACA). It was created largely in response to the Soviet Union's launch of the first artificial satellite, Sputnik 1.
$\text{Year Founded} = 1958$
Step 3: Major Achievements.
NASA is responsible for most of the major US space exploration efforts, including the Apollo moon-landing missions, the Skylab space station, and later the Space Shuttle. It currently manages projects such as the James Webb Space Telescope and the Artemis program to return humans to the Moon.
Final Answer: Option C