Which of the following dates and statements are both accurate and reflect an important step in the european conquest and settlement of america?

a. 1001 the norse explorer leif erikson sets up a small settlement in what is today newfoundland on the east coast of canada
b. 1418 legendary chinese naval commander zheng lands in south america with a fleet of mighty warships.
c. 1493 columbus returns from his first voyage. queen isabella makes him an admiral and grants him a larger fleet so that he may return this time with 17 ships and 1,200 men.
d. 1499 amerigo vespucci accompanies columbus on his final voyage and persuades him that he has discovered a new continent.
e. 1507 thor hyerdahl and the crew of kon tiki sail across the pacific ocean which leads to conquest of the incas in the andes mountains.