The small collection vessel without internals shown in the figure receives condensed material from two exchangers in parallel. The condensate from both exchangers is subcooled. The collection vessel's purpose is to smooth the variations in the condensate flow rates as the condensate is recycled to a reactor. Recently the plant rate was increased about $20\%$ above the previous highest rate. Operators had to reduce the plant rate because the level in the collection tank continued to rise. The operators reported that whenever the collection vessel's level dropped below $20-25\%,$ the flow from the vessel decreased below the required $22-gpm$ expected rate. This resulted in a tank level rising to a high level, which opened the $2-$in$.$ Teflonlined max$-$port plug $100\%.$ The level in the vessel continued to rise. Plant rate had to be reduced. What material should you have on hand for a planned outage to correct this problem?

A$.$ A $2-$in$.$ Teflon$-$lined plug valve

O B$.$ A new level instrument

C$.$ Flat $\frac{1}{4}-$in$.$ plate $($for vortex breaker$)$

D$.$ A hydroblast machine