Which incident gave President Johnson the opportunity to increase American engagement in Vietnam?

1. The Soviets secretly placed dozens of nuclear missiles there

2. The North Vietnamese attacked American ships in the Gulf of Tonkin

3. China invaded South Vietnam with North Vietnamese forces

4. The Viet Cong appealed to the United States to support their cause

2. The North Vietnamese attacked American ships in the Gulf of Tonkin

Explanation:

In early August 1964, two U.S. destroyers stationed in the Gulf of Tonkin in Vietnam radioed that they had been fired upon by North Vietnamese forces. In response to these reported incidents, President Lyndon B. Johnson requested permission from the U.S. Congress to increase the U.S. military presence in Indochina

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Number 2.

Explanation:

Just found online.

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

the answer is jerusalem