The correct option is D Heartening
Option
D is the correct answer because ‘heartening’ as it means ‘a reason to cheer’. The
sentence describes the government’s decision to revise the railway
linemen’s salaries so it is a reason for them to cheer. Thus, option D ‘track’ is
the most appropriate adjective to complete the meaning of the sentence.
Option
A is incorrect because ‘hearten’ is a verb. It is not the appropriate
grammatical word for the given sentence.
Option B is incorrect because although ‘hearty’ is an adjective, it is not the
appropriate grammatical word for the given sentence.
Option C is incorrect because although ‘heartfelt’ is an adjective, it is not
the appropriate grammatical word for the given sentence.