What do Muslims do on a hajj?

A. They fast during the day for a month
B. they give wealth to the poor and needy C. C. They pray five times each day
D. They travel to the holy city of Mecca

D. They travel to the holy city of Mecca.

During the Hajj, Muslims fulfill one of the five pillars of Islam by traveling to the holy city of Mecca in Saudi Arabia. It is a pilgrimage that is obligatory for every able-bodied Muslim who can afford it. The Hajj typically takes place during the Islamic month of Dhu al-Hijjah and involves various rituals, including circumambulating the Kaaba, performing the Sa'i (ritual walk) between the hills of Safa and Marwa, spending a night at the plain of Mina, and standing in worship on the plains of Arafat.