Final answer:
To see a dinosaur, one should travel to the (C) Mesozoic era, specifically around 150 million years ago during the Jurassic period, when dinosaurs were thriving. The Mesozoic era is also known as the Age of Dinosaurs, and its central periods included the Triassic, Jurassic, and Cretaceous.
Step-by-step explanation:
If you want to see a dinosaur, it would be best to set the controls of your time machine for the Mesozoic era, approximately 150 million years ago. This era is also known as the Age of Reptiles or the Age of Dinosaurs, and it lasted from about 252 million years ago to 66 million years ago. It is separated into the Jurassic, Cretaceous, and Triassic periods. Dinosaurs flourished during the middle of this era, especially during the Jurassic period.
During the Jurassic, which lasted from about 201.3 million years ago to 145 million years ago, dinosaurs were the dominant land animals, and the environment supported a great diversity of life. The Cretaceous Period, however, was when dinosaurs reached their peak in size and distribution, which lasted from 145 million years ago until their dramatic extinction 65 million years ago. Therefore, option C: Mesozoic era, 150 million years ago, is the correct time period to see dinosaurs.