Traduzca la siguiente frase. ¿Sabes si habrá mucha gente en la conferencia sobre energía renovable?

A. Do you know if there are a lot of people at the conference on renewable energy?
B. Do you know if there will be a lot of people at the conference on renewable energy?
C. Do you know if there were a lot of people at the conference on renewable energy?
D. Will there be a lot of people at the conference on renewable energy?