Angels Inc. fabricates garage doors. Roofs are punched in a roof punching press $($R$-$Punch$)$ for $7$ minutes per roof, and then are formed in a roof forming press $($R$-$Form$)$ for $6$ minutes per roof. Bases are punched in a base punching press $($B$-$Punch$)$ for $7$ minutes per base, and then formed in a base forming press $($B$-$Form$)$ for $13$ minutes per base. The formed base is welded in a base welding machine $($Weld$)$ for $5$ minutes per base. The base and the roof then go to final assembly $($Assembly$)$ which takes $10$ minutes per garage door. There is one operator and one machine at each station. The operator and the machine work as a single server.

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$1.$ What is the Theoretical Flow Time? $($The minimum time required to produce a garage door from start to finish.$)$ The potential answers are:

A: $39$ minutes.

B: $46$ minutes.

C: $49$ minutes.

D: $44$ minutes.

E: $35$ minutes.