C. It is fifth degree because the highest power in it is 5. It is a binomial because there are two terms in it.
A is also 5th degree, but it has three terms. D is a binomial, but its degree is 3.
B is neither a binomial nor fifth degree.
Answer:
I found x for you, right there.
Answer:
The second option: Waxing crescent - first quarter; Waning gibbous - third quarter