why wont my car start on 1993 BMW 325i

1993 bmw 325i new battery was sitting up for 1 month and now wont start

Asked by for the 1993 BMW 325i
3 answers
does your car start with a boost?
TRY CHARGING BATTERY OR USE JUMPER BOX
Is the engine turning when you try to start it? Sounds crazy but have to ask!