Which is a compound sentence?
A: Mr. Duran peeled the tangerine and divided it into sections.
B: Pam and her brother rummaged through the boxes in the attic, but they couldn't find their father's childhood baseball glove.
The second sentence is the compound sentence. It is made up of two independent clauses joined by the coordinating conjunction but.
Pam and her brother rummaged through the boxes in the attic, but they couldn't find their father's childhood baseball glove.