The decline of the popularity of the silk road a. led to the end of the mongol empire b. encouraged exploration and the discovery of new trade routes c. meant economic ruin for chinese society, from which they have been unable to recover d. resulted in a decline in the power of the islamic empire

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.

Answeraquifer;