A suspense is not the climax, since there can be suspense many times before the climax. Tension is not necessarily an action either. Suspense doesn't have to happen early or later, but when it is meant to happen. Also, there's no required number of plot lines. With that, we can discard options A, B and C.
By definition, suspense is: <em>"the feeling of excitement or nervousness that you have when you are waiting for something to happen"</em> and tension is a <em>"mental or emotional strain"</em>. Which are really close to their definitions in storytelling:
D. Suspense is the feeling of wanting to know what happens next in a story, while tension is the feeling produced by a story's unresolved conflict.
