At this point, the writer wants to express how Lee first began the craft of blacksmithing. Which choice would most effectively accomplish this task?

A. NO CHANGE
B. Carting 4-H groups out from Michigan to the east coast for various county fairs and expositions, Lee had spent the summer.
C. Lee had spent the summer, for various county fairs and expositions, carting 4-H groups out from Michigan to the east coast.
D. OMIT the underlined portion.