A good length to use would have to be somewhere between 1.375 and 1.625 inches, making 1.5 an acceptable one. If x is equivalent to 1.5, it will make the inequality of 1.375 is less than or equal to x is less than or equal to 1.625 a true statement as long as x is being replaced with 1.5.
:Life for me ain't been no crystal stair" because you life isn't literally a stair case for anyone. The speaker is simply comparing his/her life to something else that it couldn't be.
Hey there!~
I would say the best answer is Option B. With drafting you really shouldn't be trying your hardest... just kind of trying to get your ideas out. Once that's done you can start checking for mistakes. Kind of like how I did with this answer; I wrote it out, and then came back after I was finished and fixed all the imperfections.
Hope this helps!
~Fluerie