THE MAIN IDEA OF THIS PASSAGE IS BEST EXPRESSED IN WHICH SENTENCE

2. The main idea of this passage is best expressed in which sentence?a. Sentence (1): Today, bicycles are so common that it’s hard to believe they haven’t always beenaround.b. Sentence (13): It wasn’t until 1874 that the first truly modern bicycle appeared on the scene.c. Sentence (4): Since then, however, numerous innovations and improvements in design have madethe bicycle one of the most popular means of recreation and transportation around the world.d.Sentence (18): Today they are built, used, and enjoyed all over the world.