How did jan matzeliger change the shoemaking industry in the 1800s?

i know c is an incorrect answer.

a. stitching shoes was laborious, so matzeliger invented the sewing machine.
b. adding laces to shoes was laborious, so matzeliger invented the lacing machine.
c. adding heels to shoes was laborious, so matzeliger invented the heeling machine.
d. attaching the top of the shoe to the sole was laborious, so matzeliger invented the lasting machine.

In my honest opinion , i’d say franklin d roosevelt was a president that impacted our nation , i say this because fdr is voted among top three best us presidents and he was the longest serving president by 3 terms , usually presidents only supposed to have two terms increments of 4 years , equivalent to 8 years total before election time. and he established the fdic , through the 1933 banking act and he established the us , social security system , during his presidency, and established a national minimum wage , through the fair labor standards act , fdr led the allied coalition to victory in wwii and he played a major role in the creation of the united nations.