Which information is necessary to solve this story problem?

there are 16 people at a barbeque fundraiser. the barbeque lasts for 5 hours. mark buys 2 hot dogs for each person. each hot dog cost $3. how much does mark spend altogether?

a.
2 hot dogs per person, 16 people, $3 per hot dog

b.
5 hours, 16 people, 2 hot dogs per person

c.
2 hot dogs per person, 16 people

d.
2 hot dogs per person, $3 per hot dog