Henry ford adapted the assembly line to make cars. the assembly line is an innovation in factory production.
which sentence combines these two sentences with an appositive phrase?
1) adapting an innovation in factory production, henry ford used the assembly line to make cars.
2)henry ford adapted the assembly line, which was an innovation in factory production.
3)henry ford adapted the assembly line, an innovation in factory production, to produce cars.
4)henry ford adapted the assembly line to make cars, and the assembly line is an innovation in factory production.

D. Henry Ford adapted the assembly line, an innovation in factory production, to produce cars.

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recent brain research has shown some surprising benefits as a result of formal musical training. learning to play a musical instrument appears to develop parts of the brain that can even influence academic results. the studies indicate that the earlier a child begins training, the more benefits there are. one such study showed that children who began musical studies before the age of seven had a more developed brain in the region where language production and auditory processing take place. scientists believe there is mounting evidence to show that early musical training can improve brain function.

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