What Is the Difference Between a Glacial and Interglacial Period

Multiple Choice

What is the difference between a glacial and interglacial period?

A) Glacial periods are longer than interglacial periods.
B) Glacial periods are colder than interglacial periods.
C) Glacial periods are shorter than interglacial periods.
D) Glacial periods are more recent than interglacial periods.
E) Glacial periods are more frequent than interglacial periods.