In a small office construction project, the following activities are scheduled in sequence. i) Digging and pouring footings - 5 days ii) Working on the slab and pouring - 3 days iii) Framing the floor - 5 days iv) Wall framing - 4 days v) Roof framing - 6 days vi) Insulation and drywall - 7 days vii) Interior doors and trim - 3 days viii) Hardware and fixtures - 2 days. What is the minimum time to complete the project if all activities are on a critical path except number viii, and activity iii is delayed by 1 day?

(A) 32 days
(B) 33 days
(C) 34 days
(4) 35 days

Please explain how to reach the answer.Many Thanks.