Answer: I would contend that the right answer is the B) Players often return to a game after a head injury—they.
Explanation: By using a dash or specifically an "em-dash" ( — ) at the end of the sentence, the writer is clarifying or amplifying the information that he or she has already provided (that players often return to a game after a head injury). Options C and D are grammatically incorrect, so they should be discarded. Furthermore, since the two sentences ("players..." and "they do not want...") are not independent, the use of a semicolon (option A) should also be discarded.
It sounds urgent. Phrases such as "Hurry-hurry" especially highlight this. Also, the phrase "can't you see" implies that the people aren't working fast enough and emphasizes the urgency.
Inscects may contain vemon that may be harmfull to children and adults which can cause the to have allergic reaction or seizures or even death in some cases