According to paragraph 1, why has trade been so important throughout the history of the Middle East

• The rare and valuable metals and stones found in Middle Eastern deserts have always been in high demand in surrounding areas.
• Growing conditions throughout the Middle East are generally poor, forcing Middle Eastern people to depend on imported grain.
• Many useful and decorative raw materials cannot be found naturally in the Middle East but are available from neighboring regions.
• Frequent travel, due to limited water supplies in the Middle East, created many opportunities for trade with neighboring societies.

This is a multiple choice.