1) steel manufacturing was once key to pennsylvania’s economy. (2) the making of iron products was also key. (3) these industries made some people, such as andrew carnegie, very rich. (4) in 1873 carnegie began building steel mills. (5) his steel business was so successful that he became one of the wealthiest men in the world.
which is the most effective way to invert sentence 2 in order to vary sentence patterns?
a key was iron product making also. b iron product making key also. c also key was the making of iron products. d making iron products, also key.

The correct answer is C.

The most effective way to invert the sentence "The making of iron products was also key" is "Also key, was the making of iron products".

This is because it correctly inverts the two parts of the sentence while maintaining its meaning.

Answers A and B are incorrect because the word order used does not form coherent sentences.

And answer D is incorrect because it does not invert the sentence. It simply replaces the word "was" for a comma.

no its not a run on sentence however i think you meant wet suits not sours also a run on sentence would be like surfers surf all winter long in southern california by using wet sours to keep them warm and the live their all year long