Which of the following is considered an abnormal course condition?

Temporary water is considered an abnormal course condition because it significantly affects play and player safety. According to the Rules of Golf, an abnormal course condition includes conditions that are not meant to be part of the course and therefore interfere with the player's ability to play their ball as intended. Temporary water, often a result of rainfall or flooding, can create a situation where a ball may be unplayable or where a player's stance or swing is impeded, warranting relief under the rules.

In contrast, sandy areas are typically considered normal course features such as bunkers, which are expected parts of the golf course. Rough grass is also a standard part of the course and does not qualify as abnormal. Out of bounds areas, while they can complicate play, are established boundaries of the course rather than conditions affecting play in the same manner as temporary water. Thus, temporary water stands out as distinctly defined under the rules as an abnormal condition impacting play.