The correct answer is C. The moon is between the sun and the earth.
A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon’s apparent diameter is larger than the Sun’s, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth’s surface, with the partial solar eclipse visible over a surrounding region thousands of kilometers wide.
A solar eclipse can occur only during a new moon, when the Sun and Moon are in conjunction as seen from Earth. Hence, solar eclipses are predictable. They are among the most widely observable astronomical phenomena and have been recorded since ancient times. The next solar eclipse will occur on April 8, 2024.