A "corrido" is a) a narrative poem based on an event
b) a newspaper article relating a recent event
c) a recent bullfight
d) a recent piece of nonfiction

Corridos are a form of narrative song or verse popular in Mexico and the southwestern United States. ... The classic corrido is a narrative ballad, generally consisting of regular verses of four octosyllabic lines, beginning with a verse setting the theme, then telling a story, and ending with a despedida (farewell).

a) a narrative poem based on an event.

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

judge is the correct answer