Question

there are two types of main ultra events. what are the two types?
a events in which runners walk half of the race and run the other half
b events in which runners run as far as they can in a certain time
c events in which runners can both bike and run
d events in which runners run from aid station to aid station.
e events in which runners run a set number of miles

Explanation:

En los eventos ultra, hay dos tipos principales: los eventos en los que los corredores corren una distancia fija (un número determinado de millas) y los eventos en los que los corredores corren la mayor distancia posible en un tiempo determinado. La opción B se refiere a los eventos basados en tiempo y la opción E se refiere a los eventos basados en distancia.

Answer:

B. events in which runners run as far as they can in a certain time, E. events in which runners run a set number of miles