Types of Run-Ons and How to Fix Them
RO--Comma Splice: They took the test, they all did well. (IC, IC.)
RO--Fused Sentence: They took the test they all did well. (IC IC).
FIX--Add a period: They took the test. They all did well. (IC. IC.)
FIX--Add a subordinating conjunction: Since they took the test, they all did well. (DC, IC.)
FIX--Add a comma and FANBOY: They took the test, and they all did well. (IC,cc IC.)
FIX--Add a semicolon: They took the test; they all did well.
(IC; IC.)
FIX--Add a semicolon and a conjunctive adverb: They took the
test; therefore, they all did well. (IC; ca,IC.)