On December $31,$ the Sundog Insurance Company had $$50$ million in assets and $$30$ million in capital $($owners$\text{'}$ equity$).$ According to the

basic accounting equation, Sundog's liabilities as of December $31$ were equal to

A$.$ $$20$ million

B$.$ $$30$ million

C$.$ $$50$ million

D$.$ $$80$ million