Abby is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years. Abby is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years.Abby is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years.Abby is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years.Abby is a competitive horseback rider, and she will be competing in the next World Equestrian Games, which are held every four years. Is this a simple, compound, complex, or compound-complex?