Read the paragraph.

Tanya leaned forward again and pulled back on the oars. With each pull she moved them a bit closer to the opposite shore, but it still seemed impossibly far. Her friend Valentina sat a few feet away, up in the bow, dabbling fingers in the water. She didn’t seem to have any idea how hard Tanya was working.

Which is the best word for the type of vehicle in which Tanya and Valentina are traveling?

a boat
a ship
a craft
a rowboat