50. If the writer were to delete the opening sentence of this paragraph, the essay would primarily lose information that:

Answer and Explanation

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.