Given that:
Avis Irvine office a dinner special for $25 per person plus a $5 per person tip.
Then for m person the special dinner is $25m and $5 per person tip.
Then the total cost is:
[tex]C=25m+5[/tex]And if we conclude the tip for each m person then the total cost become:
[tex]C=25m+5m[/tex]So option A C and D are correct.