If the underlying stock is the same for all options, which of the following is a bear spread?
Use letters in alphabetical order to select options

A. Ten Aug 20 long puts and ten Aug 30 short puts.
B. Ten Jan 50 long puts and ten Jan 45 short puts.
C. Ten Nov 60 puts and ten Nov 60 calls.
D. Ten Feb 50 long puts and ten Feb 50 short puts.