Yes it is, it has a period therefore a complete sentence.
Dr. Lanyon is an intelligent, respectable lawyer who is suspicious the "Mr. Hyde" is threatening or bullying Dr. Jekyll into giving him property and leaving money for him in his will. Because Dr. Lanyon is an intelligent man, he always looks for a logical, practical answer, which is why he does not wonder is Hyde and Jekyll are the same person.
It should be a simile because the word 'like' is there.
Hope this helps!
Answer: D. Take up the White Man's burden— And reap his old reward: The blame of those ye better, The hate of those ye guard—
"The White Man's Burden" is a poem written by Rudyard Kipling. The "burden" refers to the responsibilities Kipling believed colonizers had towards colonized people. From his point of view, the societies that were colonized benefitted greatly from becoming colonies. England provided them with education, technology, health care, a new political system, etc. All things that Kipling believed every society needed and benefitted from.
In this line, Kipling argues that part of the burden is not being appreciated for your contribution. He says that those that you "better" (improve) or "guard" (protect) end up blaming you and hating you. He means that locals end up resenting and hating the colonizers, despite their contributions. He considers this part of the "white man's burden."