What features of pre-islamic arabian religions are preserved in the teachings of muhammad?
a. the command that muslims only worship a single god, allah
b. the encouragement to pilgrimage to mecca and pray at the kaaba
c. the specific dietary rules that prohibit eating pork and other foods
d. the prohibition against creating or worshiping idols

   B. The encouragement to pilgrimage to Mecca and pray at the Kaaba

Explanation:  Pre-Islamic religions with the Arabs were polytheistic, and Kaaba was a place of worship, where the Arabs adored various idols before that Islamic period. Kaaba is the quadruple stone that Abraham put up with his son Ismail, who is considered the patron of the Arab. Initially, Kaaba was a place of worship one God, since Abraham was the one who knew one God. Over the centuries, this place has become a worship site of idols, until the appearance of Muhammad, who cleansed Kaaba from all elements of polytheism and returned its original Abraham's character. Every Muslim who aspires to maintain the five pillars of Islam, should at least in life, if possible, go to pilgrimages to Mecca, and worship Kaaba.

u.s.a

china

india

and

japan

that would be the steamboat because none of the other things are forms of transportation