Final answer:
A mountain lion may attack if it is threatened, hungry, in its territory, or protecting its cubs, so the correct answer is D) All of the above.
Step-by-step explanation:
A mountain lion attack may occur at any time under several conditions. Answer D) All of the above is correct because a mountain lion may feel compelled to attack if it feels threatened or hungry, if it is within its own territory, or especially if it's protecting its cubs. These are all situations that could trigger an aggressive response from a mountain lion. Always maintain a high level of awareness when in mountain lion territory and know the appropriate safety measures to minimize the risk of an encounter turning into an attack.