The answer is B. the occurrence of huge events in Earth's natural history
The geologic time scale is a system of chronological dating that relates geological strata to time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history.
The answer should be (D) Ca, because all others either occur as diatomic or are anions.
The name given to this compound is carbon monoxide, there is a single oxygen and since it is a covalent compound, we need to specify the O, with the prefix meaning 1.
