Answer and Explanation:
a. Jaina could define objects that refer to false memories and had emotional connections or not with the volunteer and checking their reaction when observing this object. This definition would be efficient because it would establish an IV that could be easily manipulated by Jaina, causing different results to be analyzed.
b. An ethical problem that Jaina may face in the study is the intensification or the possibility of the emergence of disadvantageous and painful memories for the participants, which would harm their well-being and even their psychological health.