Select the letter that identifies the primary function of the following

sentence: At midnight the old clock in the hall loudly tolled the hour,
an intrusive sign of life in the still, dark house.
a. reveals information about the setting
b. advances the plot
c. reveals information about a character

a. reveals information about the setting

The primary function of the sentence "At midnight the old clock in the hall loudly tolled the hour, an intrusive sign of life in the still, dark house" is a. reveals information about the setting.

To determine the primary function of the sentence, we need to analyze its content.

Let's break down the sentence:
"At midnight the old clock in the hall loudly tolled the hour, an intrusive sign of life in the still, dark house."

This sentence provides information about the action of the old clock loudly tolling the hour at midnight. It mentions the clock as an "intrusive sign of life" in the still, dark house.

Considering these elements, we can conclude that the primary function of this sentence is to reveal information about the setting. It describes the atmosphere of the house and its environment by highlighting the presence of an old clock that loudly tolls the hour at midnight. This information helps to create a specific mood and enrich the visual description of the scene.

Therefore, the correct answer is: a. reveals information about the setting.