Laos and cambodia were drawn into the vietnam war because

a. they were bordered on the east by the gulf of tonkin.

b. johnson ordered bombing raids on both countries in 1969.

c. vietcong supply lines, along the hoo chi minh trail, ran across their borders into north and south vietnam.

d. more than 400,000 north vietnamese civilians fled to laos and cambodia in 1971 via the hoo chi minh trail.

C. Vietcong supply lines, along the Hoo Chi Minh Trail, ran across their borders into North and South Vietnam.

Explanation:

The Vietnam War was an extremely complex war that affected a large number of countries. In the United States, the war was very unpopular. However, many other countries were similarly involved in this conflict. Some of these countries were Laos and Cambodia, which were involved because Vietcong supply lines, along the Hoo Chi Minh Trail, ran across their borders into North and South Vietnam.

formulating the initial idea for the policy

answer is c.