Question: Which statement is true? (LO3) a) X n has always been positive. b) X n has always been negative. c) X n had been positive

Which statement is true? (LO3)

a) X n has always been positive.

b) X n has always been negative.

c) X n had been positive from the turn of the century until the 1970s.

d) X n had been negative from the turn of the century until the 1970s.

e) None of these statements is true.

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