A timeline is titled Nuclear Proliferation, 1950–Present. The timeline ranges 1940–2010. A timeline is titled Nuclear Proliferation, 1950-Present. The timeline ranges from 1940 to 2010. The entries are as follows:

July 16, 1945: United States tests the first atomic bomb in New Mexico.
August 29, 1949: Russia tests its first atomic bomb using plutonium.
October 3, 1952: United Kingdom tests its first atomic bomb aboard the HMS Plym.
February 13, 1960: First French atomic bomb is detonated in the Sahara Desert.
October 16, 1964: China tests its first atomic bomb using uranium.
March 5, 1970: The Nuclear Nonproliferation Treaty to limit the spread of nuclear weapons comes into force.
May 18, 1974: India tests its first atomic bomb in the Rajasthan Desert.
May 1998: Pakistan tests its first atomic bomb.
October 2006: North Korea tests its first atomic bomb.
Use the timeline to answer the question.

What does this timeline suggest about nuclear proliferation?

A. After World War II, other nations felt the need to develop their own nuclear bombs.
B. After the destruction caused by the first atomic bombs, nations joined to prevent future use and development of nuclear weapons.
C. The United States and the Soviet Union both supplied their allies with nuclear weapons.
D. Although there were a number of nations developing atomic bombs right after World War II, there was no longer a need to worry about more countries doing so.