This word means the same as the given italicized word. Hence option C is correct.
Option A: 'Delicacies' means 'fineness or intricacy of texture or structure'.
Option B: 'Tacts' means 'ability to say or do the right thing without making anyone unhappy or angry'.
Option D: 'Gestures' means 'actions performed to convey feelings or intention'.
These words do not mean the same as the given word 'graces'.
So, options A, B and D are wrong.