The answer option which is not a characteristic of major depressive disorder is: D. Chest tightness.
In Psychology, a major depressive disorder is also referred to as depression and it can be defined as a common mood disorder and serious medical illness that negatively affects how a person in the following ways:
Basically, a major depressive disorder is an emotional or mood disorder that is typically characterized by the following characteristic (attributes):
In conclusion, chest tightness or tightness of the chest are not considered to be a characteristic of major depressive disorder.
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Your question is lacking the necessary answer options, so I will be adding them here:
A. Loss of appetite
B. Little interest in activities once enjoyed
C. Sleeplessness
D. Chest tightness