WILLIAM SHAKESPEARE: Twelfth Night

Read the extract below and answer the question

I have said too much unto a heart of stone,
And laid my honour too unchary on ‘t;
There’s something in me that reproves my fault,
But such a headstrong potent fault it is
That it but mocks reproof.
(Acts iii, Scene 4)

The figure of speech used in ” a heart of stone” is

A. hyperbole
B. metonymy
C. paradox
D. metaphor

Correct Answer: Option D

D. metaphor