The correct options are
A <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
The strong demand for Asian goods and raw-materials in European countries.
C <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
Closure of land routes by the Ottoman Turks after they captured Constantinople
The Renaissance age paved way for people to question if the earth was flat and hence voyages were taken to check this. These voyages also led to the demand of Asian goods which were brought back to Europe. And since the land route was blocked by the Ottoman Turks, discovering sea routes became important.