Which Course of Action Most Improves the Following Sentence

Multiple Choice

Which course of action most improves the following sentence?
The incumbent senator was afraid of losing his seat; he took a no-holes-barred approach to the campaign.

A) Capitalize senator.
B) Remove the hyphens from no-holes-barred.
C) Change no-holes-barred to no-holds-barred.
D) Change the semicolon to a comma.