Production of the Ford Model T, which was colloquially known as the Tin Lizzie,
commenced in 1908, during the presidency of Theodore Roosevelt,
was not discontinued until nearly two decades later, during the presidency of Calvin Coolidge, who stimulated competition in the automobile industry by lowering corporate taxes and encouraging consumer spending.
First Clause :
Production of the Ford Model T commenced in 1908Second clause:
was not discontinued until nearly two decades later, during the presidency of Calvin Coolidge, who stimulated competition in the automobile industry by lowering corporate taxes and encouraging consumer spending.We must have conjunction to join two clauses, and this is the main flaw of choice A: Choice C fixes this issue
A) which was colloquially known as the Tin Lizzie, commenced in 1908, during the presidency of Theodore Roosevelt,
B) colloquially known as the Tin Lizzie, had commenced in 1908, during the presidency of Theodore Roosevelt, and
C) which was colloquially known as the Tin Lizzie, commenced in 1908, during the presidency of Theodore Roosevelt, and
D) colloquially known as the Tin Lizzie and commenced in 1908, during the presidency of Theodore Roosevelt it
E) colloquially known as the Tin Lizzie, which had commenced in 1908, during the presidency of Theodore Roosevelt, and