Good morning, class. Today we're going to discuss the history of the bicycle. The first bicycle, invented in the early 19th century, had no pedals and was pushed along by the rider's feet. Later, in the 1860s, pedals were added to the front wheel. However, these early bicycles were very uncomfortable due to their solid rubber tires and rough frames. It wasn't until the 1880s that the safety bicycle, with two equal-sized wheels and a chain drive, became popular. This design made cycling much safer and more accessible to the general public.
❓ Según la conferencia, ¿qué hizo que la bicicleta de seguridad fuera más popular que los modelos anteriores?
A. Tenía una rueda delantera más grande y pedales.
B. Fue el primer modelo en utilizar neumáticos de goma.
C. Tenía dos ruedas de igual tamaño y una transmisión por cadena.