A. Thoughtless
B. Unkind
C. Coarse
D. Illiterate
✅ The correct answer is option C.
Thoughtless : (of a person or their behaviour) not showing consideration for the needs of other people.
Thoughtless : (of a person or their behaviour) not showing consideration for the needs of other people.
Unkind : inconsiderate and harsh to others.
Coarse : (of a person or their speech) rude or vulgar.
Illiterate : unable to read or write.
Vulgar : making explicit and offensive reference to sex or bodily functions; coarse and rude.
Synonym of Vulgar is Coarse