The conflict can be called different things, but it should be something like vs. nature, vs. environment, vs. external even.
The most appropriate answer is D. The fans with their fingers crossed builds tension. We as the readers are curious to know what the outcome will be.
The rest of the answer choices doesn't build tension.
If this question is from Penn Foster, then your answer should be "<span>from their own point of view"
</span>
Jekyll's letter in the excerpt from The Strange Case of Dr. Jekyll and Mr. Hyde reveals that D. Jekyll is in a desperate situation and needs help from Lanyon.