Why do so many hurricanes experienced by florida have the same locations of origin off the west coast of Africa to the Caribbean Sea

Many hurricanes experienced by florida have the same locations of origin off the west coast of Africa to the Caribbean Sea because the interaction between the hot dry air of the Sahara and the cooler, more humid air from the Gulf of Guinea to its South forms what's known as the African easterly jet, which blows from east to west across Africa.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.