B is the correct answer !
The primary effect of the Dred Scott decision, based only on the option in this list, was that "Congress could not prohibit slavery," but mostly it meant that blacks weren't considered citizens and thus could not sue for their freedom.
Rocks are basically sand and gravel mixed together and, under high pressure, form hard, lasting objects.
Answer:
The Tiber
Explanation:
According to legend, the city of Rome was founded in 753 BC on the banks of the Tiber about 25 kilometres (16 mi) from the sea at Ostia. Tiber Island, in the center of the river between Trastevere and the ancient city center, was the site of an important ancient ford and was later bridged.
