Imagine an active, employed sixty-year-old who does not have dementia. Which of the following statements offers an explanation why he might not be as good at forming memories as he was when younger? His brain is no longer making new neurons.
He has lost too many synapses through underuse.
He is not as emotional as he once was.
He has too many neurofibrillary tangles.

Karen is waiting by the lockers before school for her friend richard. they had agreed to look over the history review sheet together to be ready for the test later that day. richard shows up late with uncombed hair and wrinkled clothes. karen: "you're five minutes late and you look like a wreck! " richard: (slams his locker) "you know, i don't have time for this." karen: "fine! figure out the test on your own! "