What can be done to extend the life of a vessel with a corroded area in the shell plate 6 inches from the weld, a joint efficiency of less than 1, and a corrosion thickness currently near the minimum required thickness?

What can be done to extend the life of a vessel with a corroded area in the shell plate 6 inches from the weld, a joint efficiency of less than 1, and a corrosion thickness currently near the minimum required thickness?
A . Recalculate t minimum for current operating conditions using E < 1.
B . Recalculate t minimum for current operating conditions using E = 1.
C . Recalculate t minimum for design conditions using E = 1.
D . Monitor the thickness during the run.

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Answer: C