Read what Myrna wrote about a hockey game she attended last week. Members of both hockey teams were at the top of their game. They had trained hard and honed the skills needed to compete effectively. They all focused on the other team like the worthy opponents they were and did not waver from their assigned missions. They struck with precision and with a discipline that seemed unimaginable months before. Both teams used everything in their arsenals, but finally the home team prevailed.

Which phrase in the paragraph helps Myrna understand the meaning of arsenals?

A. skills needed to compete
B. at the top of their game
C. their assigned missions
D. worthy opponents