When using a systematic random sample, we determine the interval (i) which is needed to select the 2nd through to the nth participant for the sample

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When using a systematic random sample, we determine the interval (i) which is needed to select the 2nd through to the nth participant for the sample. How do we select the the first participant?

	a)  Randomly selecting a number between 1 and the total sample needed (n)
	b)  Randomly selecting a number between 1 and i.
	c)  Close your eyes and pick one.
	d)  Take the first participant on the list.