If a compound word is not listed in the​ dictionary, then a. write it as two separate words. b. use a dash between the two words. c. hyphenate the two words. d. you may choose to hyphenate or not hyphenate the two words.

it would be C hope it helps.

Well, Saudi Arabia is known to be ruled by the Islamic law and is also known to not be a democracy (so options B and D are wrong).

Now, the head of the govenment is the king, and he is usually not  called "the supreme leader"... this is a term rather used in Iran.

So I think that the best answer is C. The royal family controls the government.(which is true!)