The best option describing how Islam, Christianity, and Judaism are similar is that they are all
monotheistic religions that trace their origins back to Abraham.
Here's why this is the best answer and why other similarities are less central:
* Monotheism: This is a core shared belief. All three religions believe in one God.
* Abrahamic Origins: All three religions recognize Abraham (Ibrahim in Islam) as a key figure and a patriarch in their religious history. They all consider themselves descendants of Abraham, either through lineage or through faith.
While there are other similarities (ethical teachings, belief in prophets, etc.), monotheism and Abrahamic origin are the most fundamental and defining characteristics they share.