Question

The phrase “once upon a time” serves as a(n) ___________ to

a book.
A) Allusion
B) Metaphor
C) Simile
D) Introduction

Answer 1

d an introduction

Step-by-step explanation:

Answer 2

D. Introduction

Step-by-step explanation:

The phrase " once upon a time " is an introduction to a book. I hope this answer helped you. I am certain that this is the correct answer.