Read the excerpt below and answer the question.

i was staring at the door, making it out in my mind rather than seeing it, in the dark. i lay quite still—a victim already—but the arrhythmia of my heart was fleeing, knocking this way and that against its body-cage. how finely tuned the senses are, just out of rest, sleep! i could never listen intently as that in the distractions of the day; i was reading every faintest sound, identifying and classifying its possible threat.

identify the tone of this excerpt from the opening of nadine gordimer’s “once upon a time.”

angry
ominous
flat
peaceful