Given the following past returns for a stock:

2013 + 15 %

2014 + 18 %

2015 + 30 %

2016 - 20 %

2017 + 10 %

Together, this stocks expected return and stand alone risk measure mean:

a. there is a roughly 70% chance the actual return will be between - 8.02% and + 29.22%

b. there is a roughly 70% chance the actual return will be between + 8.02% and + 29.22%

c. there is a roughly 70% chance the actual return will be between - 3.41% and + 29.91%

d. there is a roughly 70% chance the actual return will be between + 3.41% and + 29.91%

e. there is a roughly 70% chance the actual return will be between - 8.62% and + 28.62%

this is all the info provided, it's using a nominal distribution