Answer:
D) Who.
Explanation:
The fans wondered how the player ____ had been hurt could continue to play in the game.
In the given sentence, "the player" is the object of the sentence. And since the reference is for a person, the use of "who" is preferable.
A). The use of 'he' is wrong as it is not a valid representation for the object 'player'.
B). 'That' can also be used but as it can also be used to refer to 'the player' but in cases of persons, the use of 'who' is preferred more.
C). 'What' cannot be used as it more commonly denotes a thing or an inanimate idea or quality.
D). 'Who' is the right option for 'the player' as it rightly refers to the person/ living being.
Thus, the correct word/ phrase for the given sentence will be "WHO".
