According to the Definition of Stress,what Would NOT Necessarily Be

According to the definition of stress,what would NOT necessarily be considered stress

A)  You ask someone out on a date and feel quite happy about the answer. 
B)  A friend brings over her pet kitten, and you find the little beast irritating. 
C)  You see a man with a knife in front of you, and you freeze in fear. 
D)  You witness a car accident in which you were not involved, and it leaves you too shaken to drive.