The sentence that contains a compound subject is B. Their friends and relatives from Austria visit often.
Explanation:
The subject of a sentence is the person, thing or idea that carries out the action defined in the predicate. When the sentence has two or more subjects, that subject is called <u>compound subject</u>. In a <u>compound subject</u>, the individual subjects are joined by a coordinating conjunction, such as <em>and</em>, <em>or</em>, etc. In this case, the individual subjects that form the compound one are <em>their friends</em> and <em>relatives </em><em>(from Austria.)</em>
In "the fun they had . " tommy finds a book. The book's pages are yellow and crinkly becauseitwasanoldbookwhichexcitednearlya100yearsagowhenthebookswereprintedin spiteofbeingsavedandshowninthetelevisionscreenthattommyandMargiehad.
The job of the ranger is to conserve the territory where the key Deer lives therefore he knows in detail what are the conservation programs and protocols that are in place to protect this specie.