When the Federal Income Tax Was Established in 1913,the Tax

When the federal income tax was established in 1913,the tax code was 400 pages long,but by 2016,the federal income tax code _____

A) was nonexistent.
B) was 1 page long.
C) was about 400 pages long.
D) was about 74,000 pages long.
E) was extremely complex and unmanageable.