Answer:
Option B.
Explanation:
Let the people who attended the banquet are p.
Since cost of food is $13 per person, so cost of p persons = $13p
The cost of renting a function room is $240 
So the expression which represents the total cost C for p people will be 
C = 13p + 240 
Now for p = 58 persons we have to evaluate the expression.
C = 13×58 + 240
 = 754 + 240
 = $994
Therefore, option B. is the answer.