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By serving others, a person focuses on someone other than himself or herself, ______ can be very eye-opening and rewarding.

   A. who       B. which     C. what       D. that

By serving others, a person focuses on someone other than himself or herself,_____can be very eye---opening and rewarding.

A.      who  B.which  C.what  D.that

By serving others,a person focuses on someone other than himself or herself,_______can be very eye-opening and rewarding.

A.who                                                             B.which

C.what                                                            D.that

By serving others, a person focuses on someone other than himself or herself,_____can be very eye---opening and rewarding.

A.     who  B.which  C.what  D.that

By serving others, a person focuses on someone other than himself or herself, ___________ can be very eye-opening and rewarding.

  A. who               B. which                   C. what             D. that