Which of these is generally not a propaganda technique? a. measurable data b. playing on fears c. appealing to patriotism d. exaggeration of features

Measurable data, A.
This is because propaganda is never actually realistic, like facts. Propaganda is always excessively exaggerated.
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A - Measurable data.

This is because propaganda is meant to make the enemy look bad or have a bad image within the nation. Options B, C, and D all appeal to the idea of gaining members to join the military or armed forces to fight against the so called horrible enemy. For instance, the red scare played on Americans fears against the Soviet Union.

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Spanish conquistadors demanded labour from natives.