A- My maternal grandmother is sixty-six.
B is incorrect as thunderstorms are one word that does not require a hyphen.
C is incorrect as herself is also a singular word. As for D, nine and days have no correlation other than it's used in the sentence. If anything, the hyphen would need to be placed between the twenty and the nine.
Hope this helps!
It is a Climax of a story
"a testimonial" would most likely include positive information about one side of an issue, although it should be noted that this is not always the case with testimonials.
