50. If the writer were to delete the opening sentence of this paragraph, the essay would primarily lose information that:
Your Answer is
Correct Answer is F
Explanation
According to the meaning of the sentence, this sentence expresses the connection between the author and biofeedback. Item F is explained correctly.
Item G: one of many experimental therapies is not mentioned.
Item H: several stress-related health problems are not mentioned.
Item J: long-standing interests are not mentioned.