What is the recommended reason for changing an answer during an exam?

Changing an answer during an exam is advisable when a better rationale is found. This means that upon reevaluating the question, you may realize that the information or reasoning you initially considered was incomplete or flawed. If additional insights, knowledge, or reflections lead you to a stronger understanding of the question or an alternative answer, it demonstrates a deeper engagement with the material. This process can often be the result of rethinking the context of the question or recalling relevant information that supports a different choice.

The other options do not provide a solid basis for changing answers. Feelings of uncertainty alone don't justify a switch, as they may stem from test anxiety rather than factual reasoning. Changing answers due to time constraints or because of the perceived ease of another question lacks a logical foundation and could lead to impulsive decisions that are not rooted in a thorough understanding of the content.