En general que surge primero ¿La teoria o el experimento?​

The difference(s) between the grand canyon and valles marineris is/are: (a) the grand canyon was formed by water, but valles marineris was not. (a) valles marineris is much longer than the grand canyon. (c) valles marineris is much wider than the grand canyon. (d) valles marineris has large volcanoes near it. all of the above

What would have happened to portugal’s trade if they had not found a way to sail around the tip of africa

Which phrase describes the time it takes for a planet to make a complete rotation