Read the two passages about the destruction of Pompei.

There was found a skeleton with a bronze axe, having attempted to break through the wall next to him. It is not unreasonable to suppose that he was . . . unable to flee by means of the courtyard, where the volcanic debris was too abundant, had attempted to make his way through the opposite wall.

–François de Paule Latapie

A cloud . . . was ascending, the appearance of which I cannot give you a more exact description of than by likening it to that of a pine tree, for it shot up to a great height in the form of a very tall trunk, which spread itself out at the top into a sort of branches.

–Letter to Cornelius Tacitus, Pliny the Younger

Which statement best explains the difference between the viewpoints of the writers of the two passages?

The first passage is opinion, while the second passage is fact.
The first passage is relevant, while the second passage is irrelevant.
The first passage is subjective, while the second passage is objective.
The first passage is a secondary source, while the second passage is a primary source.