The munificence of the businessman was great.

Answer: Option A

Generosity : the quality of being kind and generous.
Stinginess : miserly, mean.
Misery : a state or feeling of great physical or mental distress or discomfort.
Tactfulness : saying the right thing at the right time.
Munificence : the quality or action of being extremely generous.

Synonym of Munificence is Generosity