Explanation

The spending, combined with bad investments, left the boxer insolvent, so you need something like excessive for the blank. Both parsimonious and penurious are nearly the opposite of what you’re looking for, so eliminate choices (A) and (B). Neither perfidious, which means disloyal, nor pugnacious, which means belligerent, makes sense in the blank, so eliminate choices (C) and (F). Both prodigal and profligate can mean excessive, particularly in reference to spending, so choices (D) and (E) give you appropriate, equivalent sentences.

Hence options D and E are correct!