New technologies and ideas were introduced to Europe as a result of the Crusades. Some of these technologie and ideas included... a)Algebra, the astrolabe, and Arabic numerals.
b)Silk, spices, gold, and jewels.
c)Christianity, Arabic numerals, the astrolabe.
d)Silk, algebra, geometry, maps.

The correct answer is a)Algebra, the astrolabe, and Arabic numerals.

Explanation:

Here's a list of technologies that were introduced to Europe through the Muslims:

A list of some ideas:

answer: b.

explanation:

in 1989, tiananmen square in beijing was the site of china’s main industries. china’s government headquarters. -pro-democracy demonstrations. (second choice)