What immortal hand or eye

Dare frame thy fearful symmetry?

The "immortal hand or eye" alludes to God or Satan.

How does this allusion affect the meaning of the poem?

A. The speaker questions who created such a fearsome animal.

B. The speaker believes the tiger's beauty is a balance between good and evil.

C. The allusion shows the speaker believes in only God's power.

Since we know that the speaker is questioning about God or Satan creating the Tyger, choice A is the best answer here.

If we consider the background of the poem and the poet itself. William Blake wrote many poems in this particular vein, discussing and questioning God's power and omniscience. "The Tyger" is a paired poem (its partner is "The Lamb") from Songs of Innocence and Experience. In "The Lamb," Blake discusses the innocence of the lamb and what it represents.

Conversely, in "The Tyger" discusses experience or even the darker aspect of life. When you look at the line being referenced, the speaker is questioning if God, the same one that made the innocent lamb, can also make the fearsome tiger in the poem.