Final answer:
Complete sentences can be joined by punctuation such as semicolons and coordinating conjunctions like the FANBOYS. A run-on sentence is formed when two or more complete sentences are joined without correct punctuation or connectors. The correct option is B.
Step-by-step explanation:
Complete sentences can be joined by using punctuation such as commas, semicolons, and periods, as well as conjunctions. Specifically, the conjunctions used for this purpose are known as coordinating conjunctions which include for, and, nor, but, or, yet, and so, represented by the mnemonic FANBOYS.
A run-on sentence is formed when two or more complete sentences are joined without appropriate punctuation or connecting words. Run-on sentences can be revised by adding a period to separate the sentences into distinct full sentences, by using a semicolon to join them, or by adding a coordinating conjunction to create a compound sentence. Additionally, one can use a semicolon accompanied by a transitional word or phrase to connect them, or turn a sentence into a subordinate clause with a subordinating conjunction.
An example of a run-on sentence might be: 'She runs every morning she is very healthy'; the error can be corrected to 'She runs every morning; she is very healthy.' or 'She runs every morning, and she is very healthy.'