Scientist: "We Will Probably Never Know Just How Large or How

Scientist: "We will probably never know just how large or how great the universe really is. The reality is that it is just so vast that it may prove impossible to learn all its secrets, but that is no excuse for not trying to learn everything we can about the world around us."
Which of the following is a principle with which the scientist quoted above would most likely agree?

A) We cannot know if something is doable until we try it.
B) Even if something seems impossible, we should attempt it anyway.
C) Even if something seems impossible, we should attempt it unless doing so would place us in danger.
D) Even things that at first seem impossible are possible if you try.
E) If something can't be done well, it is better not to even attempt it.