Question

read the excerpt from the adventure of the mysterious picture.i began to undress, but in spite of every effort i could not keep myself from stealing a glance every now and then at the picture; and a glance was now sufficient to distress me. even when my back was turned to it, the idea of this strange face behind me, peering over my shoulder, was insufferable. i threw off my clothes and hurried into bed; but still this visage gazed upon me.what effect does the tone of the excerpt have on the reader?it fosters a belief that the narrator is unreliable.it encourages surprising delight in blood and gore.it inspires confidence that everything will work out fine in the end.it produces shivers down the spine, or a feeling of unease.

Explanation:

The excerpt uses anxious, unsettling language (words like "distress me," "insufferable," "gazed upon me") that creates a tense, uneasy atmosphere. This tone does not suggest an unreliable narrator, delight in gore, or optimism, but instead evokes a sense of discomfort in the reader.

Answer:

It produces shivers down the spine, or a feeling of unease.