Who started a school for navigators in portugal
a. henry the navigator
b. marco polo
c. leif ericson
d. christiphor columbus

i actually have a suggestion instead of an answer, how about next time instead of spending the time to time up the question you take that time and try to figure something out for yourself, do you understand?

explanation:

leave a 5 star and a and brainliest answer if you understand, hope this betters you day, or not i don't really care either way. xd

a sample of water is taken and kept in a beaker in a freezer at a constant temperature of 0°c. if the system is at dynamic equilibrium, which of these statements is true?  

sense of self-interest

-he wants to reinforce that students and teachers still have their first amendment rights during the school day.