Why did fifteenth-century europeans search for a sea route to asia? choose all answers that are correct. a. europeans had begun to demand valuable goods such as silk and spices that could only be found in asia. b. european merchants had manufactured goods to sell in asia but needed a way to get them there. c. european monarchs were eager to learn more about asian culture. d. the ottoman turks controlled the silk road, which was the main land route from europe through the middle east to asia.