All Else Equal, Which of the Following Would Increase the Unemployment

All else equal, which of the following would increase the unemployment rate?
(i) an increase in the number of women who return to work after being stay-at-home mothers
(ii) a preference among older men to retire early
(iii) an increase in the maximum number of weeks for which someone can receive government unemployment benefits
(iv) an increase in the number of previously unemployed women who stop looking for work and become discouraged workers

A) (i) and (ii) only
B) (iii) only
C) (ii) and (iii) only
D) (ii) , (iii) , and (iv) only