I say the answers is A but if you mean ventilation in the area of the room then answer B
C. seems like the best answer. i may be wrong so don’t quote me on that
Answer You ask your coach
Complete Question
The complete question is shown on the first uploaded image
Answer:
a) The required additional minterms for f so that f has eight primary implicants with two literals and no other prime implicant are and
b) The essential prime implicant are and
c) The minimum sum-of-product expression for f are
Explanation:
The explanation is shown on the second third and fourth image