Go to the screen "Mars Mission Landing Sites," and and select Opportunity landing site (2004). Explore all five zoom levels offered, making sure to read the captions at the tops of the screens. Based on the information provided, why was the landing site, called Meridiani Planum, chosen for the Opportunity mission? a. The region was already known to have minerals likely to have formed in liquid water. b. The region was in the only part of Mars that had not yet been explored. c. The region is near the Martian equator, which makes landing easier. d. The region was already known to have very small rocks called "blueberries" that likely formed in liquid water. e. The region has very low elevation, and therefore might once have been in an ancient ocean.