What is the thesis statement of the research report Life on Mars?

* But, in fact, the truth might be hidden in this ordinary-looking piece of meteorite known as Rock 84-001.

i am pretty sure D the answer
* Deep Space is the last great frontier.
* Some imagined the answer would come from a spaceship carrying aliens from a faraway civilization.
* Some scientists theorized that the seeds for life on Earth were planted by microorganisms from Mars.

Question

What is the thesis statement of the research report Life on Mars?  

    * But, in fact, the truth might be hidden in this ordinary-looking piece of meteorite known as Rock 84-001.

i am pretty sure D the answer 
    * Deep Space is the last great frontier.
    * Some imagined the answer would come from a spaceship carrying aliens from a faraway civilization.
    * Some scientists theorized that the seeds for life on Earth were planted by microorganisms from Mars.