B and D
It is obviously not A or C but both B and D are debatable so BD would be the best answer I could think of.
In general, silk was most likely was Persia’s most valuable asset. It was silk and similar entities that were traded by Persians along the infamous Silk Road, which connected the far East with Europe. Persia was in an advantageous position right in the middle.
In that year the French Revolution took place.
