In this excerpt from act I, scene II, of Macbeth, what can be inferred from Banquo’s response to the witches’ prophecy?

BANQUO:
That, trusted home,
Might yet enkindle you unto the crown,
Besides the Thane of Cawdor. But 'tis strange:
And oftentimes to win us to our harm,
The instruments of darkness tell us truths;
Win us with honest trifles, to betray's
In deepest consequence.—
Cousins, a word, I pray you.

A.
Banquo is wise enough to understand that the witches represent evil.
B.
Banquo believes the witches and is ready to do anything to make his children kings.
C.
Banquo suspects that Macbeth plans to kill Duncan to seize the throne.
D.
Banquo supports Macbeth’s plan of murdering Duncan to get the throne.