Ineed with 2 questions how did vasco da gama’s success in opening a seagoing trade route to asia portugal? a) it allowed portugal to make new maps of the east. b) it allowed portugal to block other nations’ explorations. c) it allowed portugal to build a trading empire. d) it allowed portugal to trade with the east for the first time. 2. global exploration by sea was made possible primarily by a) longer routes. b) larger ships. c) military strength. d) new technology.