Find solutions to your problems with the help of IDNLearn.com's expert community. Discover detailed and accurate answers to your questions from our knowledgeable and dedicated community members.

What was the significance of the notch and pin on the Antikythera mechanism gears?
a. to allow for a gear to have variable rotation speed and account for the varying orbital speed of the Moon
b. to allow for a gear to have variable rotation speed and account for the retrograde motion of Mars
c. to allow for the prediction of solar eclipses
d. to measure the angular difference between Sun and Moon