The passage lists different navigational instruments available to explorers. Which of the following navigational instruments was not available to Christopher Columbus?

the correct answer is b, "fertility rates are increasing, so populations will grow more quickly in the future."

citizens get the vast majority of their political and governmental information from the media, which includes television, print journalism, radio, and now the internet. the media play an important role in connecting people to government.

because its important to learn about other countries and how high tech they are compared to us. also its good to learn about other cultures and how ours differs and in common also we need to learn about companies that we still buy since they ship it here.

lol, i think so.

explanation: