Answer:
She met her friends in the lobby of the hotel, and they headed over to the pool for a cool, refreshing swim.
Explanation:
The correct option is the first one. This revision is the most concise, free of redundancy. This means that everything necessary is said with no unnecessary words. When we say that someone is in the lobby of a hotel, we already know that they are on the bottom floor. There is no need to include both <em>lobby </em>and <em>bottom floor </em>in the same sentence. The first sentence is the only one that contains only one of these phrases/words.
Another issue with the original sentence is the incorrect use of commas, and another reason the third option is incorrect is awkward word order.
The electromagnetic wave is self propagating, what I mean by that is, an electric field generates a magnetic field at 90 degree phase angle, and the magnetic wave you get as a result generates the electric wave at the same phase angle. The interchange of electric to magnetic and vice versa continues and lets the electromagnetic waves to travel without any medium. Quite interesting, really!
Although Western Europe had long had the basic trappings of capitalism (private property, wealth accumulation, contracts), the Industrial Revolution fueled the creation of a truly modern capitalist system. Widespread credit, business corporations, investments and large-scale stock markets all become common.
