Which sentence uses correct parallel structure?me a. the curricula of most school districts in the united states tends to be dominated by english, math, history, and science is also extremely important as well. b. our three main objectives are removing lead from the water supply, replacing the broken pipes, and getting the water flowing again as fast as possible. c. colorado is a state with a great deal of natural beauty, including mountain peaks, fast-moving rivers, and it also boasts some world-famous ski slopes. d. throughout history, india has been a hub of civilization, it has been referenced frequently by far-removed cultures, and it's an academic powerhouse

Consider the text from "machu picchu: a city in the sky” and its central idea. informational text: every year, thousands of tourists come to peru to see machu picchu. to reach machu picchu, tourists can hike along the famous inca trail. the trail covers twenty-six miles. it winds through beautiful mountains, forests, and jungle. visitors can also take a bus or train ride up to the ruins. the train takes you past miles of farmland along the urubamba river valley. above are the andes mountains. the tops of the mountains are often covered with mist. then, the train goes up a mountain on a winding road. the road climbs almost 1,640 feet. other incan ruins can be seen beside the road. most are very small compared to the city ahead. central idea: tourists enjoy visiting machu picchu in the mountains of peru. what supporting detail is most important to include in a summary of this text? people can hike the inca trail or take a train or bus to reach machu picchu. when people travel to machu picchu, they see miles of surrounding farms. people are surprised by the mist on the peaks of the andes mountains. when people visit machu picchu, they sometimes see other smaller ruins.