A person suffering from bipolar disorder may experience _________ during the manic phase.

The correct answer highlights a key characteristic of the manic phase of bipolar disorder. During this phase, individuals often experience a decreased need for sleep, which can manifest as a reduced amount of sleep without feeling tired. This symptom is particularly notable because it distinguishes the manic phase from other mood states, providing insight into the heightened levels of energy and activity that can accompany mania.

In contrast, the other options are more indicative of depressive states or common feelings experienced during other times but not typical of the manic phase. For instance, intense sadness and extreme fatigue represent the depressive phase of bipolar disorder rather than the manic phase, where individuals typically display elevated or irritable moods, high energy levels, and a sense of invincibility. Increased energy can also be a feature of mania, but it is essential to recognize that the manic phase specifically often includes a marked reduction in the need for sleep, reinforcing the unique nature of experiences during this time.

Overall, this understanding of sleep patterns in mania helps in recognizing the symptoms of bipolars and distinguishes it from depressive tendencies.