Final answer:
The first scientist to explore the moon with a telescope was Galileo Galilei, who used his telescopes to make groundbreaking observations. Option c is correct.
Step-by-step explanation:
The first scientist to explore the moon with a telescope was Galileo Galilei. Using his self-constructed telescopes, Galileo made numerous astronomical discoveries, including detailed observations of the moon's surface, identifying craters and mountains.
His pioneering work with the telescope in the early 17th century led to significant advancements in our understanding of the solar system and laid the foundation for modern astronomy.
Hence, Galileo Galilei, utilizing his telescopes, was the pioneering scientist to observe the moon. Option c is correct.