Between 1800 and 1840, Many European Countries Began to Close

Between 1800 and 1840, many European countries began to close the industrial gap with Great Britain,

A) and most countries were able to completely close that gap by 1850 on their own initiative.
B) but by 1850, continental Europe was still almost twenty years behind Great Britain in industrialization.
C) thanks to Great Britain's eagerness to share its technical knowledge and industrial machinery.
D) and by 1850, key areas like Prussia had even surpassed Great Britain in industrial production.