Posted by **clara** on Thursday, September 27, 2012 at 6:49pm.

An Li reached puberty at age 12, and John Smith retired at age 65. An Li's and John Smith's experiences are examples of:

A. normative events.

B. non-normative influences.

C. critical periods.

D. risk factors.

I chose A. but now reading a little more into it, I'm not sure if B is the right answer. Please help.

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