Why was trade the primary economic activity in Arabia

The Arabian Peninsula is situated between the Arabian Sea (Indian Ocean) and the Mediterrnen Sea. As there was no sea connection, trade routes criss crossed the Peninsula and imporant trding ports sprang up all along the perifery. This was the primary economic activity for centuries, involvement in trade or raiding those involved in trade. With the Islamic outburst, Arabs seized control of a vast empire (7th century).

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the answer is d. selective incorporation. (apex)

answer: in 1900, there were no "workplace safety laws"!

explanation: at the beginning of this century, workers in the united states faced remarkably high health and safety risks on the job.

a century ago in 1900 about three hundred out of every one hundred thousand miners were killed on the job each year.

[industria] developments occurred within a legal and regulatory climate that diminished employer’s interest in safety. as a result, americans developed production methods that were both highly productive and often very dangerous.