Everyone who has worked for him hammers home that point because they feel that it is widely unappreciated.

A. hints

B. stresses

C. strikes

D. directs

Answer: Option C

Solution(By Examveda Team)

Hints : a slight or indirect indication or suggestion.
Stresses : a state of mental or emotional strain or tension resulting from adverse or demanding circumstances.
Strikes : hit forcibly and deliberately with one's hand or a weapon or other implement.
Directs : control the operations of; manage or govern.
Hammers : strike or knock at or on something violently with one's hand or with a hammer or other object.

Synonym of Hammers is Strikes