PLZ HELP FAST Which statement best describes how the spread of Islam also led to the spread of knowledge, scholarship, and learning?

Other cultures’ ideas were destroyed as Islam spread through conquest.
Ideas spread within Muslim societies but did not spread to other places.
Ideas moved from place to place as Islam spread through conquest and trade.
New knowledge was spread only through conquest.

Which one of the following was not a reason for the emergence of the single-family peasant farm as the basic unit of agricultural production in the early middle ages? select one: a. the mounted soldier made warfare expensive, so many warriors became full-time farmers. b. the declining birthrate made it necessary for entire families to work in agricultural production. c. horses made it easier, although more expensive, for farmers to support themselves. d. it was more economically feasible for landowners to rent their land to farmers. e. villa owners could no longer purchase slaves.