When can Bermudan options be exercised?

A. Any time during the life of the options
B. Any time after a certain date up to the end of the life of the life
C. Any time before a certain date or at the end of the option's life
D. On dates specified at the start of the option

D

Bermudan options can be exercised on specified dates but not all dates. (Bermuda is between Europe and America!)