Which describes a major advantage of steamboats over other vessels?
they allowed for travel against a river's current.

b.
they had a very good safety record.

c.
they required less fuel than a sailing ship.

d.
they could float in shallower water than a canal boat.

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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