What series of laws changed how america punished drug users

The United States puts more people behind bars than any other country, five times as many per capital compared with Britain or Spain.

Explanation:

It wasn't always like this. Half a century ago, relatively few people were locked up, and those inmates generally served short sentences. But 40 years ago, New York passed strict sentencing guidelines known as the "Rockefeller drug laws" — after their champion, Gov. Nelson Rockefeller — that put even low-level criminals behind bars for decades.  Those tough-on-crime policies became the new normal across the country. But a new debate is under way over the effectiveness of tough sentencing laws.

the correct answer is d