Which version of the sentence uses correct parallel structure?

a. saving is the key to a comfortable old age, and not saving is to be the key to an anxious one.
b. saving is the key to a comfortable old age, and in not saving is the key to an anxious one.
c. saving is the key to a comfortable old age, and not saving is the key to an anxious one.
d. saving is the key to a comfortable old age, and not to save is the key to an anxious one.

correct!

hope this !

~coco

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.

explanation:

judge is the correct answer

c i took the test and ig: is @yfw.madison

explanation: