By 1967 the size of antiwar protests showed that:
O
A. activists were organized by foreign governments.
O
B. protestors were exclusively younger citizens.
O
C. opposition to the war was decreasing.
O
D. opposition to the war was no longer radical.

The correct answer is d) opposition to the war was no longer radical.

Explanation:

During the Vietnam War different demonstrations took place to demand that the war stop. People who opposed the war went from being radical groups to general opposition.

These demonstrations began with small student associations, then different groups joined, which included religious, mothers of soldiers, veterans, hippies, and human rights organizations, managing to join more than 500,000 people who marched in 1967 to Washington to demand the finished of the war that was going on in Vietnam.

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