An example of a research approach that assesses change after the treatment or intervention is over is experimental design. The correct option is c.
The aim of preparing research in a goal and monitored manner in order to maximize precision and draw specific conclusions about a hypothesis statement is known as experimental design.
Experimental design is an example of a research approach that assesses change after the treatment or intervention has ended.
Thus, the correct option is c.
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The missing options of the question are: