________ are possible reasons for why people are fearful of younger generations.
a) Legitimate differences between generations that leads to conflict and nostalgia leading to negative comparisons between yesterday's and today's youth
b) Generation-defining events that alter collective perspectives and jealousy toward younger generations and their more readily available resources
c) Internal alarm systems from evolutionary biology and nostalgia leading to negative comparisons between yesterday's and today's youth
d) Legitimate differences between generations that leads to conflict and jealousy toward younger generations and their more readily available resources
e) Internal alarm systems from evolutionary biology and generation-defining events that alter collective perspectives