At the Start of the Triassic, Most of the Continents

Multiple Choice

At the start of the Triassic, most of the continents were above sea level, and sediments from that time are often red because ______.

A) they include iron oxides
B) the dry climate baked clays to form hornfels
C) they are a major source of uranium and red quartz
D) there are extensive dune fields
E) they contain extensive deposits of iron ore