Excerpt from letter to william lloyd garrison from harriet beecher stowe
harriet beecher stowe

there does not appear to be any deep underlying stratum of bitterness -- he did not seem to me malignant or revengeful.

which dictionary definition best applies to the word malignant as it is used in the selected line?
a) showing cruelty
b) tending to produce death
c) producing disease or tumor
d) feeling or showing ill will or hatred