A. Each of the Bulletin Boards are unique.
Naknahatrepid ulrep atik aragen id ajareb isutitsni hakapagnem
The red sea, the Persian gulf, the gulf of Oman, the gulf of Aden, and Arabian sea
<span>The correct answer is A, because that is the only option where there is a subordinate adjective clause 'which come in many varieties'. </span>